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parser.yy @ a2eda27

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Last change on this file since a2eda27 was 097e2b0, checked in by Peter A. Buhr <pabuhr@…>, 9 years ago
constructor/destructor, more example programs
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1	//
2	// Cforall Version 1.0.0 Copyright (C) 2015 University of Waterloo
3	//
4	// The contents of this file are covered under the licence agreement in the
5	// file "LICENCE" distributed with Cforall.
6	//
7	// cfa.y --
8	//
9	// Author : Peter A. Buhr
10	// Created On : Sat Sep 1 20:22:55 2001
11	// Last Modified By : Peter A. Buhr
12	// Last Modified On : Thu Oct 8 17:17:54 2015
13	// Update Count : 1473
14	//
15
16	// This grammar is based on the ANSI99/11 C grammar, specifically parts of EXPRESSION and STATEMENTS, and on the C
17	// grammar by James A. Roskind, specifically parts of DECLARATIONS and EXTERNAL DEFINITIONS. While parts have been
18	// copied, important changes have been made in all sections; these changes are sufficient to constitute a new grammar.
19	// In particular, this grammar attempts to be more syntactically precise, i.e., it parses less incorrect language syntax
20	// that must be subsequently rejected by semantic checks. Nevertheless, there are still several semantic checks
21	// required and many are noted in the grammar. Finally, the grammar is extended with GCC and CFA language extensions.
22
23	// Acknowledgments to Richard Bilson, Glen Ditchfield, and Rodolfo Gabriel Esteves who all helped when I got stuck with
24	// the grammar.
25
26	// The root language for this grammar is ANSI99/11 C. All of ANSI99/11 is parsed, except for:
27	//
28	// 1. designation with '=' (use ':' instead)
29	//
30	// Most of the syntactic extensions from ANSI90 to ANSI11 C are marked with the comment "C99/C11". This grammar also has
31	// two levels of extensions. The first extensions cover most of the GCC C extensions, except for:
32	//
33	// 1. nested functions
34	// 2. generalized lvalues
35	// 3. designation with and without '=' (use ':' instead)
36	// 4. attributes not allowed in parenthesis of declarator
37	//
38	// All of the syntactic extensions for GCC C are marked with the comment "GCC". The second extensions are for Cforall
39	// (CFA), which fixes several of C's outstanding problems and extends C with many modern language concepts. All of the
40	// syntactic extensions for CFA C are marked with the comment "CFA". As noted above, there is one unreconcileable
41	// parsing problem between C99 and CFA with respect to designators; this is discussed in detail before the "designation"
42	// grammar rule.
43
44	%{
45	#define YYDEBUG_LEXER_TEXT (yylval) // lexer loads this up each time
46	#define YYDEBUG 1 // get the pretty debugging code to compile
47	extern char *yytext;
48
49	#undef __GNUC_MINOR__
50
51	#include <cstdio>
52	#include <stack>
53	#include "TypedefTable.h"
54	#include "lex.h"
55	#include "ParseNode.h"
56	#include "TypeData.h"
57	#include "LinkageSpec.h"
58
59	DeclarationNode *theTree = 0; // the resulting parse tree
60	LinkageSpec::Type linkage = LinkageSpec::Cforall;
61	std::stack< LinkageSpec::Type > linkageStack;
62	TypedefTable typedefTable;
63	%}
64
65	//*********************** TERMINAL TOKENS ******************************
66
67	// keywords
68	%token TYPEDEF
69	%token AUTO EXTERN REGISTER STATIC
70	%token INLINE // C99
71	%token FORTRAN // C99, extension ISO/IEC 9899:1999 Section J.5.9(1)
72	%token CONST VOLATILE
73	%token RESTRICT // C99
74	%token FORALL LVALUE // CFA
75	%token VOID CHAR SHORT INT LONG FLOAT DOUBLE SIGNED UNSIGNED
76	%token BOOL COMPLEX IMAGINARY // C99
77	%token TYPEOF LABEL // GCC
78	%token ENUM STRUCT UNION
79	%token TYPE FTYPE DTYPE CONTEXT // CFA
80	%token SIZEOF
81	%token ATTRIBUTE EXTENSION // GCC
82	%token IF ELSE SWITCH CASE DEFAULT DO WHILE FOR BREAK CONTINUE GOTO RETURN
83	%token CHOOSE DISABLE ENABLE FALLTHRU TRY CATCH CATCHRESUME FINALLY THROW THROWRESUME AT // CFA
84	%token ASM // C99, extension ISO/IEC 9899:1999 Section J.5.10(1)
85	%token ALIGNAS ALIGNOF ATOMIC GENERIC NORETURN STATICASSERT THREADLOCAL // C11
86
87	// names and constants: lexer differentiates between identifier and typedef names
88	%token<tok> IDENTIFIER QUOTED_IDENTIFIER TYPEDEFname TYPEGENname
89	%token<tok> ATTR_IDENTIFIER ATTR_TYPEDEFname ATTR_TYPEGENname
90	%token<tok> INTEGERconstant FLOATINGconstant CHARACTERconstant STRINGliteral
91	%token<tok> ZERO ONE // CFA
92
93	// multi-character operators
94	%token ARROW // ->
95	%token ICR DECR // ++ --
96	%token LS RS // << >>
97	%token LE GE EQ NE // <= >= == !=
98	%token ANDAND OROR // && \|\|
99	%token ELLIPSIS // ...
100
101	%token MULTassign DIVassign MODassign // *= /= %=/
102	%token PLUSassign MINUSassign // += -=
103	%token LSassign RSassign // <<= >>=
104	%token ANDassign ERassign ORassign // &= ^= \|=
105
106	%token ATassign // @=
107
108	// Types declaration
109	%union
110	{
111	Token tok;
112	ParseNode *pn;
113	ExpressionNode *en;
114	DeclarationNode *decl;
115	DeclarationNode::Aggregate aggKey;
116	DeclarationNode::TypeClass tclass;
117	StatementNode *sn;
118	ConstantNode *constant;
119	LabelNode *label;
120	InitializerNode *in;
121	bool flag;
122	}
123
124	%type<tok> identifier no_01_identifier no_attr_identifier zero_one
125	%type<tok> identifier_or_type_name no_attr_identifier_or_type_name no_01_identifier_or_type_name
126	%type<constant> string_literal_list
127
128	// expressions
129	%type<constant> constant
130	%type<en> tuple tuple_expression_list
131	%type<en> unary_operator assignment_operator
132	%type<en> primary_expression postfix_expression unary_expression
133	%type<en> cast_expression multiplicative_expression additive_expression shift_expression
134	%type<en> relational_expression equality_expression AND_expression exclusive_OR_expression
135	%type<en> inclusive_OR_expression logical_AND_expression logical_OR_expression conditional_expression
136	%type<en> constant_expression assignment_expression assignment_expression_opt
137	%type<en> comma_expression comma_expression_opt
138	%type<en> argument_expression_list argument_expression for_control_expression assignment_opt
139	%type<en> subrange
140	%type<en> asm_operands_opt asm_operands_list asm_operand
141	%type<label> label_list
142	%type<constant> asm_clobbers_list_opt
143	%type<flag> asm_volatile_opt
144
145	// statements
146	%type<sn> labeled_statement compound_statement expression_statement selection_statement
147	%type<sn> iteration_statement jump_statement exception_statement asm_statement
148	%type<sn> fall_through_opt fall_through
149	%type<sn> statement statement_list
150	%type<sn> block_item_list block_item
151	%type<sn> case_clause
152	%type<en> case_value case_value_list
153	%type<sn> case_label case_label_list
154	%type<sn> switch_clause_list_opt switch_clause_list choose_clause_list_opt choose_clause_list
155	%type<pn> handler_list handler_clause finally_clause
156
157	// declarations
158	%type<decl> abstract_array abstract_declarator abstract_function abstract_parameter_array
159	%type<decl> abstract_parameter_declaration abstract_parameter_declarator abstract_parameter_function
160	%type<decl> abstract_parameter_ptr abstract_ptr
161
162	%type<aggKey> aggregate_key
163	%type<decl> aggregate_name
164
165	%type<decl> array_dimension array_parameter_1st_dimension array_parameter_dimension multi_array_dimension
166
167	%type<decl> assertion assertion_list_opt
168
169	%type<en> bit_subrange_size_opt bit_subrange_size
170
171	%type<decl> basic_declaration_specifier basic_type_name basic_type_specifier direct_type_name indirect_type_name
172
173	%type<decl> context_declaration context_declaration_list context_declaring_list context_specifier
174
175	%type<decl> declaration declaration_list declaration_list_opt declaration_qualifier_list
176	%type<decl> declaration_specifier declarator declaring_list
177
178	%type<decl> elaborated_type_name
179
180	%type<decl> enumerator_list enum_name
181	%type<en> enumerator_value_opt
182
183	%type<decl> exception_declaration external_definition external_definition_list external_definition_list_opt
184
185	%type<decl> field_declaration field_declaration_list field_declarator field_declaring_list
186	%type<en> field field_list
187
188	%type<decl> external_function_definition function_definition function_array function_declarator function_no_ptr function_ptr
189
190	%type<decl> identifier_parameter_array identifier_parameter_declarator identifier_parameter_function
191	%type<decl> identifier_parameter_ptr identifier_list
192
193	%type<decl> new_abstract_array new_abstract_declarator_no_tuple new_abstract_declarator_tuple
194	%type<decl> new_abstract_function new_abstract_parameter_declaration new_abstract_parameter_list
195	%type<decl> new_abstract_ptr new_abstract_tuple
196
197	%type<decl> new_array_parameter_1st_dimension
198
199	%type<decl> new_context_declaring_list new_declaration new_field_declaring_list
200	%type<decl> new_function_declaration new_function_return new_function_specifier
201
202	%type<decl> new_identifier_parameter_array new_identifier_parameter_declarator_no_tuple
203	%type<decl> new_identifier_parameter_declarator_tuple new_identifier_parameter_ptr
204
205	%type<decl> new_parameter_declaration new_parameter_list new_parameter_type_list new_parameter_type_list_opt
206
207	%type<decl> new_typedef_declaration new_variable_declaration new_variable_specifier
208
209	%type<decl> old_declaration old_declaration_list old_declaration_list_opt old_function_array
210	%type<decl> old_function_declarator old_function_no_ptr old_function_ptr
211
212	%type<decl> parameter_declaration parameter_list parameter_type_list
213	%type<decl> parameter_type_list_opt
214
215	%type<decl> paren_identifier paren_type
216
217	%type<decl> storage_class storage_class_name storage_class_list
218
219	%type<decl> sue_declaration_specifier sue_type_specifier
220
221	%type<tclass> type_class
222	%type<decl> type_declarator type_declarator_name type_declaring_list
223
224	%type<decl> typedef type_array typedef_declaration typedef_declaration_specifier typedef_expression
225	%type<decl> type_function type_parameter_array type_parameter_function type_parameter_ptr
226	%type<decl> type_parameter_redeclarator type_ptr type_redeclarator typedef_type_specifier
227	%type<decl> typegen_declaration_specifier typegen_type_specifier typegen_name
228
229	%type<decl> type_name type_name_no_function
230	%type<decl> type_parameter type_parameter_list
231
232	%type<en> type_name_list
233
234	%type<decl> type_qualifier type_qualifier_name type_qualifier_list type_qualifier_list_opt type_specifier
235
236	%type<decl> variable_abstract_array variable_abstract_declarator variable_abstract_function
237	%type<decl> variable_abstract_ptr variable_array variable_declarator variable_function variable_ptr
238
239	%type<decl> attribute_list_opt attribute_list attribute
240
241	// initializers
242	%type<in> initializer initializer_list initializer_opt
243
244	// designators
245	%type<en> designator designator_list designation
246
247
248	// Handle single shift/reduce conflict for dangling else by shifting the ELSE token. For example, this string
249	// is ambiguous:
250	// .---------. matches IF '(' comma_expression ')' statement
251	// if ( C ) S1 else S2
252	// `-----------------' matches IF '(' comma_expression ')' statement ELSE statement */
253
254	%nonassoc THEN // rule precedence for IF '(' comma_expression ')' statement
255	%nonassoc ELSE // token precedence for start of else clause in IF statement
256
257	%start translation_unit // parse-tree root
258
259	%%
260	//*********************** Namespace Management ******************************
261
262	// The grammar in the ANSI C standard is not strictly context-free, since it relies upon the distinct terminal symbols
263	// "identifier" and "TYPEDEFname" that are lexically identical. While it is possible to write a purely context-free
264	// grammar, such a grammar would obscure the relationship between syntactic and semantic constructs. Hence, this
265	// grammar uses the ANSI style.
266	//
267	// Cforall compounds this problem by introducing type names local to the scope of a declaration (for instance, those
268	// introduced through "forall" qualifiers), and by introducing "type generators" -- parametrized types. This latter
269	// type name creates a third class of identifiers that must be distinguished by the scanner.
270	//
271	// Since the scanner cannot distinguish among the different classes of identifiers without some context information, it
272	// accesses a data structure (the TypedefTable) to allow classification of an identifier that it has just read.
273	// Semantic actions during the parser update this data structure when the class of identifiers change.
274	//
275	// Because the Cforall language is block-scoped, there is the possibility that an identifier can change its class in a
276	// local scope; it must revert to its original class at the end of the block. Since type names can be local to a
277	// particular declaration, each declaration is itself a scope. This requires distinguishing between type names that are
278	// local to the current declaration scope and those that persist past the end of the declaration (i.e., names defined in
279	// "typedef" or "type" declarations).
280	//
281	// The non-terminals "push" and "pop" derive the empty string; their only use is to denote the opening and closing of
282	// scopes. Every push must have a matching pop, although it is regrettable the matching pairs do not always occur
283	// within the same rule. These non-terminals may appear in more contexts than strictly necessary from a semantic point
284	// of view. Unfortunately, these extra rules are necessary to prevent parsing conflicts -- the parser may not have
285	// enough context and look-ahead information to decide whether a new scope is necessary, so the effect of these extra
286	// rules is to open a new scope unconditionally. As the grammar evolves, it may be neccesary to add or move around
287	// "push" and "pop" nonterminals to resolve conflicts of this sort.
288
289	push:
290	{
291	typedefTable.enterScope();
292	}
293	;
294
295	pop:
296	{
297	typedefTable.leaveScope();
298	}
299	;
300
301	//*********************** CONSTANTS ******************************
302
303	constant:
304	// ENUMERATIONconstant is not included here; it is treated as a variable with type "enumeration constant".
305	INTEGERconstant { $$ = new ConstantNode( ConstantNode::Integer, $1 ); }
306	\| FLOATINGconstant { $$ = new ConstantNode( ConstantNode::Float, $1 ); }
307	\| CHARACTERconstant { $$ = new ConstantNode( ConstantNode::Character, $1 ); }
308	;
309
310	identifier:
311	IDENTIFIER
312	\| ATTR_IDENTIFIER // CFA
313	\| zero_one // CFA
314	;
315
316	no_01_identifier:
317	IDENTIFIER
318	\| ATTR_IDENTIFIER // CFA
319	;
320
321	// no zero_one because ambiguity with 0.0 : double constant or field selection
322	no_attr_identifier:
323	IDENTIFIER
324	;
325
326	zero_one: // CFA
327	ZERO
328	\| ONE
329	;
330
331	string_literal_list: // juxtaposed strings are concatenated
332	STRINGliteral { $$ = new ConstantNode( ConstantNode::String, $1 ); }
333	\| string_literal_list STRINGliteral { $$ = $1->appendstr( $2 ); }
334	;
335
336	//*********************** EXPRESSIONS ******************************
337
338	primary_expression:
339	IDENTIFIER // typedef name cannot be used as a variable name
340	{ $$ = new VarRefNode( $1 ); }
341	\| zero_one
342	{ $$ = new VarRefNode( $1 ); }
343	\| '(' comma_expression ')'
344	{ $$ = $2; }
345	\| '(' compound_statement ')' // GCC, lambda expression
346	{ $$ = new ValofExprNode( $2 ); }
347	;
348
349	postfix_expression:
350	primary_expression
351	\| postfix_expression '[' push assignment_expression pop ']'
352	// CFA, comma_expression disallowed in the context because it results in a commom user error: subscripting a
353	// matrix with x[i,j] instead of x[i][j]. While this change is not backwards compatible, there seems to be
354	// little advantage to this feature and many disadvantages. It is possible to write x[(i,j)] in CFA, which is
355	// equivalent to the old x[i,j].
356	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::Index ), $1, $4 ); }
357	\| postfix_expression '(' argument_expression_list ')'
358	{ $$ = new CompositeExprNode( $1, $3 ); }
359	\| postfix_expression '.' no_attr_identifier
360	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::FieldSel ), $1, new VarRefNode( $3 )); }
361	\| postfix_expression '.' '[' push field_list pop ']' // CFA, tuple field selector
362	\| postfix_expression ARROW no_attr_identifier
363	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::PFieldSel ), $1, new VarRefNode( $3 )); }
364	\| postfix_expression ARROW '[' push field_list pop ']' // CFA, tuple field selector
365	\| postfix_expression ICR
366	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::IncrPost ), $1 ); }
367	\| postfix_expression DECR
368	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::DecrPost ), $1 ); }
369	\| '(' type_name_no_function ')' '{' initializer_list comma_opt '}' // C99
370	{ $$ = 0; }
371	\| postfix_expression '{' argument_expression_list '}' // CFA
372	{
373	Token fn; fn.str = new std::string( "?{}" ); // location undefined
374	$$ = new CompositeExprNode( new VarRefNode( fn ), (ExpressionNode *)( $1 )->set_link( $3 ) );
375	}
376	;
377
378	argument_expression_list:
379	argument_expression
380	\| argument_expression_list ',' argument_expression
381	{ $$ = (ExpressionNode *)( $1->set_link( $3 )); }
382	;
383
384	argument_expression:
385	// empty
386	{ $$ = 0; } // use default argument
387	\| assignment_expression
388	\| no_attr_identifier ':' assignment_expression
389	{ $$ = $3->set_argName( $1 ); }
390	// Only a list of no_attr_identifier_or_type_name is allowed in this context. However, there is insufficient
391	// look ahead to distinguish between this list of parameter names and a tuple, so the tuple form must be used
392	// with an appropriate semantic check.
393	\| '[' push assignment_expression pop ']' ':' assignment_expression
394	{ $$ = $7->set_argName( $3 ); }
395	\| '[' push assignment_expression ',' tuple_expression_list pop ']' ':' assignment_expression
396	{ $$ = $9->set_argName( new CompositeExprNode( new OperatorNode( OperatorNode::TupleC ), (ExpressionNode *)$3->set_link( flattenCommas( $5 )))); }
397	;
398
399	field_list: // CFA, tuple field selector
400	field
401	\| field_list ',' field { $$ = (ExpressionNode *)$1->set_link( $3 ); }
402	;
403
404	field: // CFA, tuple field selector
405	no_attr_identifier
406	{ $$ = new VarRefNode( $1 ); }
407	\| no_attr_identifier '.' field
408	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::FieldSel ), new VarRefNode( $1 ), $3 ); }
409	\| no_attr_identifier '.' '[' push field_list pop ']'
410	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::FieldSel ), new VarRefNode( $1 ), $5 ); }
411	\| no_attr_identifier ARROW field
412	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::PFieldSel ), new VarRefNode( $1 ), $3 ); }
413	\| no_attr_identifier ARROW '[' push field_list pop ']'
414	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::PFieldSel ), new VarRefNode( $1 ), $5 ); }
415	;
416
417	unary_expression:
418	postfix_expression
419	// first location where constant/string can have operator applied: sizeof 3/sizeof "abc"
420	// still requires semantics checks, e.g., ++3, 3--, *3, &&3
421	\| constant
422	{ $$ = $1; }
423	\| string_literal_list
424	{ $$ = $1; }
425	\| ICR unary_expression
426	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::Incr ), $2 ); }
427	\| DECR unary_expression
428	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::Decr ), $2 ); }
429	\| EXTENSION cast_expression // GCC
430	{ $$ = $2; }
431	\| unary_operator cast_expression
432	{ $$ = new CompositeExprNode( $1, $2 ); }
433	\| '!' cast_expression
434	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::Neg ), $2 ); }
435	\| '*' cast_expression // CFA
436	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::PointTo ), $2 ); }
437	// '*' is is separated from unary_operator because of shift/reduce conflict in:
438	// { * X; } // dereference X
439	// { * int X; } // CFA declaration of pointer to int
440	// '&' must be moved here if C++ reference variables are supported.
441	\| SIZEOF unary_expression
442	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::SizeOf ), $2 ); }
443	\| SIZEOF '(' type_name_no_function ')'
444	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::SizeOf ), new TypeValueNode( $3 )); }
445	\| ATTR_IDENTIFIER
446	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::Attr ), new VarRefNode( $1 )); }
447	\| ATTR_IDENTIFIER '(' type_name ')'
448	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::Attr ), new VarRefNode( $1 ), new TypeValueNode( $3 )); }
449	\| ATTR_IDENTIFIER '(' argument_expression ')'
450	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::Attr ), new VarRefNode( $1 ), $3 ); }
451	\| ALIGNOF unary_expression // GCC, variable alignment
452	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::AlignOf ), $2 ); }
453	\| ALIGNOF '(' type_name_no_function ')' // GCC, type alignment
454	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::AlignOf ), new TypeValueNode( $3 ) ); }
455	\| ANDAND no_attr_identifier // GCC, address of label
456	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::LabelAddress ), new VarRefNode( $2, true ) ); }
457	;
458
459	unary_operator:
460	'&' { $$ = new OperatorNode( OperatorNode::AddressOf ); }
461	\| '+' { $$ = new OperatorNode( OperatorNode::UnPlus ); }
462	\| '-' { $$ = new OperatorNode( OperatorNode::UnMinus ); }
463	\| '~' { $$ = new OperatorNode( OperatorNode::BitNeg ); }
464	;
465
466	cast_expression:
467	unary_expression
468	\| '(' type_name_no_function ')' cast_expression
469	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::Cast ), new TypeValueNode( $2 ), $4 ); }
470	\| '(' type_name_no_function ')' tuple
471	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::Cast ), new TypeValueNode( $2 ), $4 ); }
472	;
473
474	multiplicative_expression:
475	cast_expression
476	\| multiplicative_expression '*' cast_expression
477	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::Mul ), $1, $3 ); }
478	\| multiplicative_expression '/' cast_expression
479	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::Div ), $1, $3 ); }
480	\| multiplicative_expression '%' cast_expression
481	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::Mod ), $1, $3 ); }
482	;
483
484	additive_expression:
485	multiplicative_expression
486	\| additive_expression '+' multiplicative_expression
487	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::Plus ), $1, $3 ); }
488	\| additive_expression '-' multiplicative_expression
489	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::Minus ), $1, $3 ); }
490	;
491
492	shift_expression:
493	additive_expression
494	\| shift_expression LS additive_expression
495	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::LShift ), $1, $3 ); }
496	\| shift_expression RS additive_expression
497	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::RShift ), $1, $3 ); }
498	;
499
500	relational_expression:
501	shift_expression
502	\| relational_expression '<' shift_expression
503	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::LThan ), $1, $3 ); }
504	\| relational_expression '>' shift_expression
505	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::GThan ), $1, $3 ); }
506	\| relational_expression LE shift_expression
507	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::LEThan ), $1, $3 ); }
508	\| relational_expression GE shift_expression
509	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::GEThan ), $1, $3 ); }
510	;
511
512	equality_expression:
513	relational_expression
514	\| equality_expression EQ relational_expression
515	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::Eq ), $1, $3 ); }
516	\| equality_expression NE relational_expression
517	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::Neq ), $1, $3 ); }
518	;
519
520	AND_expression:
521	equality_expression
522	\| AND_expression '&' equality_expression
523	{ $$ =new CompositeExprNode( new OperatorNode( OperatorNode::BitAnd ), $1, $3 ); }
524	;
525
526	exclusive_OR_expression:
527	AND_expression
528	\| exclusive_OR_expression '^' AND_expression
529	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::Xor ), $1, $3 ); }
530	;
531
532	inclusive_OR_expression:
533	exclusive_OR_expression
534	\| inclusive_OR_expression '\|' exclusive_OR_expression
535	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::BitOr ), $1, $3 ); }
536	;
537
538	logical_AND_expression:
539	inclusive_OR_expression
540	\| logical_AND_expression ANDAND inclusive_OR_expression
541	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::And ), $1, $3 ); }
542	;
543
544	logical_OR_expression:
545	logical_AND_expression
546	\| logical_OR_expression OROR logical_AND_expression
547	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::Or ), $1, $3 ); }
548	;
549
550	conditional_expression:
551	logical_OR_expression
552	\| logical_OR_expression '?' comma_expression ':' conditional_expression
553	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::Cond ), (ExpressionNode )mkList( ($1, $3, $5 ) ) ); }
554	\| logical_OR_expression '?' /* empty */ ':' conditional_expression // GCC, omitted first operand
555	{ $$=new CompositeExprNode( new OperatorNode( OperatorNode::NCond ), $1, $4 ); }
556	\| logical_OR_expression '?' comma_expression ':' tuple // CFA, tuple expression
557	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::Cond ), (ExpressionNode )mkList( ($1, $3, $5 ) ) ); }
558	;
559
560	constant_expression:
561	conditional_expression
562	;
563
564	assignment_expression:
565	// CFA, assignment is separated from assignment_operator to ensure no assignment operations for tuples
566	conditional_expression
567	\| unary_expression '=' assignment_expression
568	{ $$ =new CompositeExprNode( new OperatorNode( OperatorNode::Assign ), $1, $3 ); }
569	\| unary_expression assignment_operator assignment_expression
570	{ $$ =new CompositeExprNode( $2, $1, $3 ); }
571	\| tuple assignment_opt // CFA, tuple expression
572	{ $$ = ( $2 == 0 ) ? $1 : new CompositeExprNode( new OperatorNode( OperatorNode::Assign ), $1, $2 ); }
573	;
574
575	assignment_expression_opt:
576	// empty
577	{ $$ = new NullExprNode; }
578	\| assignment_expression
579	;
580
581	tuple: // CFA, tuple
582	// CFA, one assignment_expression is factored out of comma_expression to eliminate a shift/reduce conflict with
583	// comma_expression in new_identifier_parameter_array and new_abstract_array
584	'[' ']'
585	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::TupleC ) ); }
586	\| '[' push assignment_expression pop ']'
587	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::TupleC ), $3 ); }
588	\| '[' push ',' tuple_expression_list pop ']'
589	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::TupleC ), (ExpressionNode *)(new NullExprNode)->set_link( $4 ) ); }
590	\| '[' push assignment_expression ',' tuple_expression_list pop ']'
591	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::TupleC ), (ExpressionNode *)$3->set_link( flattenCommas( $5 ) ) ); }
592	;
593
594	tuple_expression_list:
595	assignment_expression_opt
596	\| tuple_expression_list ',' assignment_expression_opt
597	{ $$ = (ExpressionNode *)$1->set_link( $3 ); }
598	;
599
600	assignment_operator:
601	MULTassign { $$ = new OperatorNode( OperatorNode::MulAssn ); }
602	\| DIVassign { $$ = new OperatorNode( OperatorNode::DivAssn ); }
603	\| MODassign { $$ = new OperatorNode( OperatorNode::ModAssn ); }
604	\| PLUSassign { $$ = new OperatorNode( OperatorNode::PlusAssn ); }
605	\| MINUSassign { $$ = new OperatorNode( OperatorNode::MinusAssn ); }
606	\| LSassign { $$ = new OperatorNode( OperatorNode::LSAssn ); }
607	\| RSassign { $$ = new OperatorNode( OperatorNode::RSAssn ); }
608	\| ANDassign { $$ = new OperatorNode( OperatorNode::AndAssn ); }
609	\| ERassign { $$ = new OperatorNode( OperatorNode::ERAssn ); }
610	\| ORassign { $$ = new OperatorNode( OperatorNode::OrAssn ); }
611	;
612
613	comma_expression:
614	assignment_expression
615	\| comma_expression ',' assignment_expression // { $$ = (ExpressionNode *)$1->add_to_list( $3 ); }
616	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::Comma ), $1, $3 ); }
617	;
618
619	comma_expression_opt:
620	// empty
621	{ $$ = 0; }
622	\| comma_expression
623	;
624
625	//************************* STATEMENTS *****************************
626
627	statement:
628	labeled_statement
629	\| compound_statement
630	\| expression_statement { $$ = $1; }
631	\| selection_statement
632	\| iteration_statement
633	\| jump_statement
634	\| exception_statement
635	\| asm_statement
636	\| '^' postfix_expression '{' argument_expression_list '}' ';' // CFA
637	{
638	Token fn; fn.str = new std::string( "^?{}" ); // location undefined
639	$$ = new StatementNode( StatementNode::Exp, new CompositeExprNode( new VarRefNode( fn ),
640	(ExpressionNode *)(new CompositeExprNode( new OperatorNode( OperatorNode::AddressOf ), $2 ))->set_link( $4 ) ), 0 );
641	}
642	;
643
644	labeled_statement:
645	no_attr_identifier ':' attribute_list_opt statement
646	{
647	$$ = $4->add_label( $1 );
648	}
649	;
650
651	compound_statement:
652	'{' '}'
653	{ $$ = new CompoundStmtNode( (StatementNode *)0 ); }
654	\| '{'
655	// Two scopes are necessary because the block itself has a scope, but every declaration within the block also
656	// requires its own scope
657	push push
658	local_label_declaration_opt // GCC, local labels
659	block_item_list pop '}' // C99, intermix declarations and statements
660	{ $$ = new CompoundStmtNode( $5 ); }
661	;
662
663	block_item_list: // C99
664	block_item
665	\| block_item_list push block_item
666	{ if ( $1 != 0 ) { $1->set_link( $3 ); $$ = $1; } }
667	;
668
669	block_item:
670	declaration // CFA, new & old style declarations
671	{ $$ = new StatementNode( $1 ); }
672	\| EXTENSION declaration // GCC
673	{ $$ = new StatementNode( $2 ); }
674	\| function_definition
675	{ $$ = new StatementNode( $1 ); }
676	\| statement pop
677	;
678
679	statement_list:
680	statement
681	\| statement_list statement
682	{ if ( $1 != 0 ) { $1->set_link( $2 ); $$ = $1; } }
683	;
684
685	expression_statement:
686	comma_expression_opt ';'
687	{ $$ = new StatementNode( StatementNode::Exp, $1, 0 ); }
688	;
689
690	selection_statement:
691	IF '(' comma_expression ')' statement %prec THEN
692	// explicitly deal with the shift/reduce conflict on if/else
693	{ $$ = new StatementNode( StatementNode::If, $3, $5 ); }
694	\| IF '(' comma_expression ')' statement ELSE statement
695	{ $$ = new StatementNode( StatementNode::If, $3, (StatementNode )mkList(($5, *$7 )) ); }
696	\| SWITCH '(' comma_expression ')' case_clause // CFA
697	{ $$ = new StatementNode( StatementNode::Switch, $3, $5 ); }
698	\| SWITCH '(' comma_expression ')' '{' push declaration_list_opt switch_clause_list_opt '}' // CFA
699	{ $$ = new StatementNode( StatementNode::Switch, $3, $8 ); /* xxx */ }
700	// The semantics of the declaration list is changed to include any associated initialization, which is performed
701	// before the transfer to the appropriate case clause. Statements after the initial declaration list can
702	// never be executed, and therefore, are removed from the grammar even though C allows it.
703	\| CHOOSE '(' comma_expression ')' case_clause // CFA
704	{ $$ = new StatementNode( StatementNode::Choose, $3, $5 ); }
705	\| CHOOSE '(' comma_expression ')' '{' push declaration_list_opt choose_clause_list_opt '}' // CFA
706	{ $$ = new StatementNode( StatementNode::Choose, $3, $8 ); }
707	;
708
709	// CASE and DEFAULT clauses are only allowed in the SWITCH statement, precluding Duff's device. In addition, a case
710	// clause allows a list of values and subranges.
711
712	case_value: // CFA
713	constant_expression { $$ = $1; }
714	\| constant_expression ELLIPSIS constant_expression // GCC, subrange
715	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::Range ), $1, $3 ); }
716	\| subrange // CFA, subrange
717	;
718
719	case_value_list: // CFA
720	case_value
721	\| case_value_list ',' case_value
722	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::TupleC ), (ExpressionNode *)(tupleContents( $1 ))->set_link( $3 ) ); }
723	;
724
725	case_label: // CFA
726	CASE case_value_list ':' { $$ = new StatementNode( StatementNode::Case, $2, 0 ); }
727	\| DEFAULT ':' { $$ = new StatementNode( StatementNode::Default ); }
728	// A semantic check is required to ensure only one default clause per switch/choose statement.
729	;
730
731	case_label_list: // CFA
732	case_label
733	\| case_label_list case_label { $$ = (StatementNode *)( $1->set_link( $2 )); }
734	;
735
736	case_clause: // CFA
737	case_label_list statement { $$ = $1->append_last_case( $2 ); }
738	;
739
740	switch_clause_list_opt: // CFA
741	// empty
742	{ $$ = 0; }
743	\| switch_clause_list
744	;
745
746	switch_clause_list: // CFA
747	case_label_list statement_list
748	{ $$ = $1->append_last_case( $2 ); }
749	\| switch_clause_list case_label_list statement_list
750	{ $$ = (StatementNode *)( $1->set_link( $2->append_last_case( $3 ))); }
751	;
752
753	choose_clause_list_opt: // CFA
754	// empty
755	{ $$ = 0; }
756	\| choose_clause_list
757	;
758
759	choose_clause_list: // CFA
760	case_label_list fall_through
761	{ $$ = $1->append_last_case( $2 ); }
762	\| case_label_list statement_list fall_through_opt
763	{ $$ = $1->append_last_case((StatementNode )mkList(($2,*$3 ))); }
764	\| choose_clause_list case_label_list fall_through
765	{ $$ = (StatementNode *)( $1->set_link( $2->append_last_case( $3 ))); }
766	\| choose_clause_list case_label_list statement_list fall_through_opt
767	{ $$ = (StatementNode )( $1->set_link( $2->append_last_case((StatementNode )mkList(($3,$4 ))))); }
768	;
769
770	fall_through_opt: // CFA
771	// empty
772	{ $$ = 0; }
773	\| fall_through
774	;
775
776	fall_through: // CFA
777	FALLTHRU { $$ = new StatementNode( StatementNode::Fallthru ); }
778	\| FALLTHRU ';' { $$ = new StatementNode( StatementNode::Fallthru ); }
779	;
780
781	iteration_statement:
782	WHILE '(' comma_expression ')' statement
783	{ $$ = new StatementNode( StatementNode::While, $3, $5 ); }
784	\| DO statement WHILE '(' comma_expression ')' ';'
785	{ $$ = new StatementNode( StatementNode::Do, $5, $2 ); }
786	\| FOR '(' push for_control_expression ')' statement
787	{ $$ = new StatementNode( StatementNode::For, $4, $6 ); }
788	;
789
790	for_control_expression:
791	comma_expression_opt pop ';' comma_expression_opt ';' comma_expression_opt
792	{ $$ = new ForCtlExprNode( $1, $4, $6 ); }
793	\| declaration comma_expression_opt ';' comma_expression_opt // C99
794	{ $$ = new ForCtlExprNode( $1, $2, $4 ); }
795	;
796
797	jump_statement:
798	GOTO no_attr_identifier ';'
799	{ $$ = new StatementNode( StatementNode::Goto, $2 ); }
800	\| GOTO '*' comma_expression ';' // GCC, computed goto
801	// The syntax for the GCC computed goto violates normal expression precedence, e.g., goto i+3; => goto (i+3 );
802	// whereas normal operator precedence yields goto (*i)+3;
803	{ $$ = new StatementNode( StatementNode::Goto, $3 ); }
804	\| CONTINUE ';'
805	// A semantic check is required to ensure this statement appears only in the body of an iteration statement.
806	{ $$ = new StatementNode( StatementNode::Continue ); }
807	\| CONTINUE no_attr_identifier ';' // CFA, multi-level continue
808	// A semantic check is required to ensure this statement appears only in the body of an iteration statement, and
809	// the target of the transfer appears only at the start of an iteration statement.
810	{ $$ = new StatementNode( StatementNode::Continue, $2 ); }
811	\| BREAK ';'
812	// A semantic check is required to ensure this statement appears only in the body of an iteration statement.
813	{ $$ = new StatementNode( StatementNode::Break ); }
814	\| BREAK no_attr_identifier ';' // CFA, multi-level exit
815	// A semantic check is required to ensure this statement appears only in the body of an iteration statement, and
816	// the target of the transfer appears only at the start of an iteration statement.
817	{ $$ = new StatementNode( StatementNode::Break, $2 ); }
818	\| RETURN comma_expression_opt ';'
819	{ $$ = new StatementNode( StatementNode::Return, $2, 0 ); }
820	\| THROW assignment_expression_opt ';'
821	{ $$ = new StatementNode( StatementNode::Throw, $2, 0 ); }
822	// \| THROW ';'
823	// { $$ = new StatementNode( StatementNode::Throw ); }
824	\| THROWRESUME assignment_expression_opt ';'
825	{ $$ = new StatementNode( StatementNode::Throw, $2, 0 ); }
826	\| THROWRESUME assignment_expression_opt AT assignment_expression ';'
827	{ $$ = new StatementNode( StatementNode::Throw, $2, 0 ); }
828	// \| THROWRESUME ';'
829	// { $$ = new StatementNode( StatementNode::Throw ); }
830	;
831
832	exception_statement:
833	TRY compound_statement handler_list
834	{ $$ = new StatementNode( StatementNode::Try, 0,(StatementNode )(mkList(($2,*$3 )))); }
835	\| TRY compound_statement finally_clause
836	{ $$ = new StatementNode( StatementNode::Try, 0,(StatementNode )(mkList(($2,*$3 )))); }
837	\| TRY compound_statement handler_list finally_clause
838	{
839	$3->set_link( $4 );
840	$$ = new StatementNode( StatementNode::Try, 0,(StatementNode )(mkList(($2,*$3 ))));
841	}
842	;
843
844	handler_list:
845	// There must be at least one catch clause
846	handler_clause
847	// ISO/IEC 9899:1999 Section 15.3(6 ) If present, a "..." handler shall be the last handler for its try block.
848	\| CATCH '(' ELLIPSIS ')' compound_statement
849	{ $$ = StatementNode::newCatchStmt( 0, $5, true ); }
850	\| handler_clause CATCH '(' ELLIPSIS ')' compound_statement
851	{ $$ = $1->set_link( StatementNode::newCatchStmt( 0, $6, true ) ); }
852	\| CATCHRESUME '(' ELLIPSIS ')' compound_statement
853	{ $$ = StatementNode::newCatchStmt( 0, $5, true ); }
854	\| handler_clause CATCHRESUME '(' ELLIPSIS ')' compound_statement
855	{ $$ = $1->set_link( StatementNode::newCatchStmt( 0, $6, true ) ); }
856	;
857
858	handler_clause:
859	CATCH '(' push push exception_declaration pop ')' compound_statement pop
860	{ $$ = StatementNode::newCatchStmt( $5, $8 ); }
861	\| handler_clause CATCH '(' push push exception_declaration pop ')' compound_statement pop
862	{ $$ = $1->set_link( StatementNode::newCatchStmt( $6, $9 ) ); }
863	\| CATCHRESUME '(' push push exception_declaration pop ')' compound_statement pop
864	{ $$ = StatementNode::newCatchStmt( $5, $8 ); }
865	\| handler_clause CATCHRESUME '(' push push exception_declaration pop ')' compound_statement pop
866	{ $$ = $1->set_link( StatementNode::newCatchStmt( $6, $9 ) ); }
867	;
868
869	finally_clause:
870	FINALLY compound_statement
871	{
872	$$ = new StatementNode( StatementNode::Finally, 0, $2 );
873	std::cout << "Just created a finally node" << std::endl;
874	}
875	;
876
877	exception_declaration:
878	// A semantic check is required to ensure type_specifier does not create a new type, e.g.:
879	//
880	// catch ( struct { int i; } x ) ...
881	//
882	// This new type cannot catch any thrown type because of name equivalence among types.
883	type_specifier
884	\| type_specifier declarator
885	{
886	typedefTable.addToEnclosingScope( TypedefTable::ID );
887	$$ = $2->addType( $1 );
888	}
889	\| type_specifier variable_abstract_declarator
890	{ $$ = $2->addType( $1 ); }
891	\| new_abstract_declarator_tuple no_attr_identifier // CFA
892	{
893	typedefTable.addToEnclosingScope( TypedefTable::ID );
894	$$ = $1->addName( $2 );
895	}
896	\| new_abstract_declarator_tuple // CFA
897	;
898
899	asm_statement:
900	ASM asm_volatile_opt '(' string_literal_list ')' ';'
901	{ $$ = new AsmStmtNode( StatementNode::Asm, $2, $4, 0 ); }
902	\| ASM asm_volatile_opt '(' string_literal_list ':' asm_operands_opt ')' ';' // remaining GCC
903	{ $$ = new AsmStmtNode( StatementNode::Asm, $2, $4, $6 ); }
904	\| ASM asm_volatile_opt '(' string_literal_list ':' asm_operands_opt ':' asm_operands_opt ')' ';'
905	{ $$ = new AsmStmtNode( StatementNode::Asm, $2, $4, $6, $8 ); }
906	\| ASM asm_volatile_opt '(' string_literal_list ':' asm_operands_opt ':' asm_operands_opt ':' asm_clobbers_list_opt ')' ';'
907	{ $$ = new AsmStmtNode( StatementNode::Asm, $2, $4, $6, $8, $10 ); }
908	\| ASM asm_volatile_opt GOTO '(' string_literal_list ':' ':' asm_operands_opt ':' asm_clobbers_list_opt ':' label_list ')' ';'
909	{ $$ = new AsmStmtNode( StatementNode::Asm, $2, $5, 0, $8, $10, $12 ); }
910	;
911
912	asm_volatile_opt: // GCC
913	// empty
914	{ $$ = false; }
915	\| VOLATILE
916	{ $$ = true; }
917	;
918
919	asm_operands_opt: // GCC
920	// empty
921	{ $$ = 0; } // use default argument
922	\| asm_operands_list
923	;
924
925	asm_operands_list: // GCC
926	asm_operand
927	\| asm_operands_list ',' asm_operand
928	{ $$ = (ExpressionNode *)$1->set_link( $3 ); }
929	;
930
931	asm_operand: // GCC
932	string_literal_list '(' constant_expression ')'
933	{ $$ = new AsmExprNode( 0, $1, $3 ); }
934	\| '[' constant_expression ']' string_literal_list '(' constant_expression ')'
935	{ $$ = new AsmExprNode( $2, $4, $6 ); }
936	;
937
938	asm_clobbers_list_opt: // GCC
939	// empty
940	{ $$ = 0; } // use default argument
941	\| string_literal_list
942	{ $$ = $1; }
943	\| asm_clobbers_list_opt ',' string_literal_list
944	{ $$ = (ConstantNode *)$1->set_link( $3 ); }
945	;
946
947	label_list:
948	no_attr_identifier
949	{ $$ = new LabelNode(); $$->append_label( $1 ); }
950	\| label_list ',' no_attr_identifier
951	{ $$ = $1; $1->append_label( $3 ); }
952	;
953
954	//***************************** DECLARATIONS *******************************
955
956	declaration_list_opt: // used at beginning of switch statement
957	pop
958	{ $$ = 0; }
959	\| declaration_list
960	;
961
962	declaration_list:
963	declaration
964	\| declaration_list push declaration
965	{ $$ = $1->appendList( $3 ); }
966	;
967
968	old_declaration_list_opt: // used to declare parameter types in K&R style functions
969	pop
970	{ $$ = 0; }
971	\| old_declaration_list
972	;
973
974	old_declaration_list:
975	old_declaration
976	\| old_declaration_list push old_declaration
977	{ $$ = $1->appendList( $3 ); }
978	;
979
980	local_label_declaration_opt: // GCC, local label
981	// empty
982	\| local_label_declaration_list
983	;
984
985	local_label_declaration_list: // GCC, local label
986	LABEL local_label_list ';'
987	\| local_label_declaration_list LABEL local_label_list ';'
988	;
989
990	local_label_list: // GCC, local label
991	no_attr_identifier_or_type_name {}
992	\| local_label_list ',' no_attr_identifier_or_type_name {}
993	;
994
995	declaration: // CFA, new & old style declarations
996	new_declaration
997	\| old_declaration
998	;
999
1000	// C declaration syntax is notoriously confusing and error prone. Cforall provides its own type, variable and function
1001	// declarations. CFA declarations use the same declaration tokens as in C; however, CFA places declaration modifiers to
1002	// the left of the base type, while C declarations place modifiers to the right of the base type. CFA declaration
1003	// modifiers are interpreted from left to right and the entire type specification is distributed across all variables in
1004	// the declaration list (as in Pascal). ANSI C and the new CFA declarations may appear together in the same program
1005	// block, but cannot be mixed within a specific declaration.
1006	//
1007	// CFA C
1008	// [10] int x; int x[10]; // array of 10 integers
1009	// [10] * char y; char *y[10]; // array of 10 pointers to char
1010
1011	new_declaration: // CFA
1012	new_variable_declaration pop ';'
1013	\| new_typedef_declaration pop ';'
1014	\| new_function_declaration pop ';'
1015	\| type_declaring_list pop ';'
1016	\| context_specifier pop ';'
1017	;
1018
1019	new_variable_declaration: // CFA
1020	new_variable_specifier initializer_opt
1021	{
1022	typedefTable.addToEnclosingScope( TypedefTable::ID );
1023	$$ = $1;
1024	}
1025	\| declaration_qualifier_list new_variable_specifier initializer_opt
1026	// declaration_qualifier_list also includes type_qualifier_list, so a semantic check is necessary to preclude
1027	// them as a type_qualifier cannot appear in that context.
1028	{
1029	typedefTable.addToEnclosingScope( TypedefTable::ID );
1030	$$ = $2->addQualifiers( $1 );
1031	}
1032	\| new_variable_declaration pop ',' push identifier_or_type_name initializer_opt
1033	{
1034	typedefTable.addToEnclosingScope( *$5, TypedefTable::ID );
1035	$$ = $1->appendList( $1->cloneType( $5 ) );
1036	}
1037	;
1038
1039	new_variable_specifier: // CFA
1040	// A semantic check is required to ensure asm_name only appears on declarations with implicit or explicit static
1041	// storage-class
1042	new_abstract_declarator_no_tuple identifier_or_type_name asm_name_opt
1043	{
1044	typedefTable.setNextIdentifier( *$2 );
1045	$$ = $1->addName( $2 );
1046	}
1047	\| new_abstract_tuple identifier_or_type_name asm_name_opt
1048	{
1049	typedefTable.setNextIdentifier( *$2 );
1050	$$ = $1->addName( $2 );
1051	}
1052	\| type_qualifier_list new_abstract_tuple identifier_or_type_name asm_name_opt
1053	{
1054	typedefTable.setNextIdentifier( *$3 );
1055	$$ = $2->addQualifiers( $1 )->addName( $3 );
1056	}
1057	;
1058
1059	new_function_declaration: // CFA
1060	new_function_specifier
1061	{
1062	typedefTable.addToEnclosingScope( TypedefTable::ID );
1063	$$ = $1;
1064	}
1065	\| type_qualifier_list new_function_specifier
1066	{
1067	typedefTable.addToEnclosingScope( TypedefTable::ID );
1068	$$ = $2->addQualifiers( $1 );
1069	}
1070	\| declaration_qualifier_list new_function_specifier
1071	{
1072	typedefTable.addToEnclosingScope( TypedefTable::ID );
1073	$$ = $2->addQualifiers( $1 );
1074	}
1075	\| declaration_qualifier_list type_qualifier_list new_function_specifier
1076	{
1077	typedefTable.addToEnclosingScope( TypedefTable::ID );
1078	$$ = $3->addQualifiers( $1 )->addQualifiers( $2 );
1079	}
1080	\| new_function_declaration pop ',' push identifier_or_type_name
1081	{
1082	typedefTable.addToEnclosingScope( *$5, TypedefTable::ID );
1083	$$ = $1->appendList( $1->cloneType( $5 ) );
1084	}
1085	;
1086
1087	new_function_specifier: // CFA
1088	'[' ']' identifier_or_type_name '(' push new_parameter_type_list_opt pop ')' // S/R conflict
1089	{
1090	$$ = DeclarationNode::newFunction( $3, DeclarationNode::newTuple( 0 ), $6, 0, true );
1091	}
1092	// '[' ']' identifier '(' push new_parameter_type_list_opt pop ')'
1093	// {
1094	// typedefTable.setNextIdentifier( *$5 );
1095	// $$ = DeclarationNode::newFunction( $5, DeclarationNode::newTuple( 0 ), $8, 0, true );
1096	// }
1097	// \| '[' ']' TYPEDEFname '(' push new_parameter_type_list_opt pop ')'
1098	// {
1099	// typedefTable.setNextIdentifier( *$5 );
1100	// $$ = DeclarationNode::newFunction( $5, DeclarationNode::newTuple( 0 ), $8, 0, true );
1101	// }
1102	// \| '[' ']' typegen_name
1103	// identifier_or_type_name must be broken apart because of the sequence:
1104	//
1105	// '[' ']' identifier_or_type_name '(' new_parameter_type_list_opt ')'
1106	// '[' ']' type_specifier
1107	//
1108	// type_specifier can resolve to just TYPEDEFname (e.g., typedef int T; int f( T );). Therefore this must be
1109	// flattened to allow lookahead to the '(' without having to reduce identifier_or_type_name.
1110	\| new_abstract_tuple identifier_or_type_name '(' push new_parameter_type_list_opt pop ')'
1111	// To obtain LR(1 ), this rule must be factored out from function return type (see new_abstract_declarator).
1112	{
1113	$$ = DeclarationNode::newFunction( $2, $1, $5, 0, true );
1114	}
1115	\| new_function_return identifier_or_type_name '(' push new_parameter_type_list_opt pop ')'
1116	{
1117	$$ = DeclarationNode::newFunction( $2, $1, $5, 0, true );
1118	}
1119	;
1120
1121	new_function_return: // CFA
1122	'[' push new_parameter_list pop ']'
1123	{ $$ = DeclarationNode::newTuple( $3 ); }
1124	\| '[' push new_parameter_list pop ',' push new_abstract_parameter_list pop ']'
1125	// To obtain LR(1 ), the last new_abstract_parameter_list is added into this flattened rule to lookahead to the
1126	// ']'.
1127	{ $$ = DeclarationNode::newTuple( $3->appendList( $7 ) ); }
1128	;
1129
1130	new_typedef_declaration: // CFA
1131	TYPEDEF new_variable_specifier
1132	{
1133	typedefTable.addToEnclosingScope( TypedefTable::TD );
1134	$$ = $2->addTypedef();
1135	}
1136	\| TYPEDEF new_function_specifier
1137	{
1138	typedefTable.addToEnclosingScope( TypedefTable::TD );
1139	$$ = $2->addTypedef();
1140	}
1141	\| new_typedef_declaration pop ',' push no_attr_identifier
1142	{
1143	typedefTable.addToEnclosingScope( *$5, TypedefTable::TD );
1144	$$ = $1->appendList( $1->cloneType( $5 ) );
1145	}
1146	;
1147
1148	// Traditionally typedef is part of storage-class specifier for syntactic convenience only. Here, it is factored out as
1149	// a separate form of declaration, which syntactically precludes storage-class specifiers and initialization.
1150
1151	typedef_declaration:
1152	TYPEDEF type_specifier declarator
1153	{
1154	typedefTable.addToEnclosingScope( TypedefTable::TD );
1155	$$ = $3->addType( $2 )->addTypedef();
1156	}
1157	\| typedef_declaration pop ',' push declarator
1158	{
1159	typedefTable.addToEnclosingScope( TypedefTable::TD );
1160	$$ = $1->appendList( $1->cloneBaseType( $5 )->addTypedef() );
1161	}
1162	\| type_qualifier_list TYPEDEF type_specifier declarator // remaining OBSOLESCENT (see 2 )
1163	{
1164	typedefTable.addToEnclosingScope( TypedefTable::TD );
1165	$$ = $4->addType( $3 )->addQualifiers( $1 )->addTypedef();
1166	}
1167	\| type_specifier TYPEDEF declarator
1168	{
1169	typedefTable.addToEnclosingScope( TypedefTable::TD );
1170	$$ = $3->addType( $1 )->addTypedef();
1171	}
1172	\| type_specifier TYPEDEF type_qualifier_list declarator
1173	{
1174	typedefTable.addToEnclosingScope( TypedefTable::TD );
1175	$$ = $4->addQualifiers( $1 )->addTypedef()->addType( $1 );
1176	}
1177	;
1178
1179	typedef_expression:
1180	// GCC, naming expression type: typedef name = exp; gives a name to the type of an expression
1181	TYPEDEF no_attr_identifier '=' assignment_expression
1182	{
1183	typedefTable.addToEnclosingScope( *$2, TypedefTable::TD );
1184	$$ = DeclarationNode::newName( 0 ); // XXX
1185	}
1186	\| typedef_expression pop ',' push no_attr_identifier '=' assignment_expression
1187	{
1188	typedefTable.addToEnclosingScope( *$5, TypedefTable::TD );
1189	$$ = DeclarationNode::newName( 0 ); // XXX
1190	}
1191	;
1192
1193	old_declaration:
1194	declaring_list pop ';'
1195	\| typedef_declaration pop ';'
1196	\| typedef_expression pop ';' // GCC, naming expression type
1197	\| sue_declaration_specifier pop ';'
1198	;
1199
1200	declaring_list:
1201	// A semantic check is required to ensure asm_name only appears on declarations with implicit or explicit static
1202	// storage-class
1203	declaration_specifier declarator asm_name_opt initializer_opt
1204	{
1205	typedefTable.addToEnclosingScope( TypedefTable::ID );
1206	$$ = ( $2->addType( $1 ))->addInitializer( $4 );
1207	}
1208	\| declaring_list ',' attribute_list_opt declarator asm_name_opt initializer_opt
1209	{
1210	typedefTable.addToEnclosingScope( TypedefTable::ID );
1211	$$ = $1->appendList( $1->cloneBaseType( $4->addInitializer( $6 ) ) );
1212	}
1213	;
1214
1215	declaration_specifier: // type specifier + storage class
1216	basic_declaration_specifier
1217	\| sue_declaration_specifier
1218	\| typedef_declaration_specifier
1219	\| typegen_declaration_specifier
1220	;
1221
1222	type_specifier: // declaration specifier - storage class
1223	basic_type_specifier
1224	\| sue_type_specifier
1225	\| typedef_type_specifier
1226	\| typegen_type_specifier
1227	;
1228
1229	type_qualifier_list_opt: // GCC, used in asm_statement
1230	// empty
1231	{ $$ = 0; }
1232	\| type_qualifier_list
1233	;
1234
1235	type_qualifier_list:
1236	// A semantic check is necessary to ensure a type qualifier is appropriate for the kind of declaration.
1237	//
1238	// ISO/IEC 9899:1999 Section 6.7.3(4 ) : If the same qualifier appears more than once in the same
1239	// specifier-qualifier-list, either directly or via one or more typedefs, the behavior is the same as if it
1240	// appeared only once.
1241	type_qualifier
1242	\| type_qualifier_list type_qualifier
1243	{ $$ = $1->addQualifiers( $2 ); }
1244	;
1245
1246	type_qualifier:
1247	type_qualifier_name
1248	\| attribute
1249	//{ $$ = DeclarationNode::newQualifier( DeclarationNode::Attribute ); }
1250	;
1251
1252	type_qualifier_name:
1253	CONST
1254	{ $$ = DeclarationNode::newQualifier( DeclarationNode::Const ); }
1255	\| RESTRICT
1256	{ $$ = DeclarationNode::newQualifier( DeclarationNode::Restrict ); }
1257	\| VOLATILE
1258	{ $$ = DeclarationNode::newQualifier( DeclarationNode::Volatile ); }
1259	\| LVALUE // CFA
1260	{ $$ = DeclarationNode::newQualifier( DeclarationNode::Lvalue ); }
1261	\| ATOMIC
1262	{ $$ = DeclarationNode::newQualifier( DeclarationNode::Atomic ); }
1263	\| FORALL '('
1264	{
1265	typedefTable.enterScope();
1266	}
1267	type_parameter_list ')' // CFA
1268	{
1269	typedefTable.leaveScope();
1270	$$ = DeclarationNode::newForall( $4 );
1271	}
1272	;
1273
1274	declaration_qualifier_list:
1275	storage_class_list
1276	\| type_qualifier_list storage_class_list // remaining OBSOLESCENT (see 2 )
1277	{ $$ = $1->addQualifiers( $2 ); }
1278	\| declaration_qualifier_list type_qualifier_list storage_class_list
1279	{ $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
1280	;
1281
1282	storage_class_list:
1283	// A semantic check is necessary to ensure a storage class is appropriate for the kind of declaration and that
1284	// only one of each is specified, except for inline, which can appear with the others.
1285	//
1286	// ISO/IEC 9899:1999 Section 6.7.1(2) : At most, one storage-class specifier may be given in the declaration
1287	// specifiers in a declaration.
1288	storage_class
1289	\| storage_class_list storage_class
1290	{ $$ = $1->addQualifiers( $2 ); }
1291	;
1292
1293	storage_class:
1294	storage_class_name
1295	;
1296
1297	storage_class_name:
1298	EXTERN
1299	{ $$ = DeclarationNode::newStorageClass( DeclarationNode::Extern ); }
1300	\| STATIC
1301	{ $$ = DeclarationNode::newStorageClass( DeclarationNode::Static ); }
1302	\| AUTO
1303	{ $$ = DeclarationNode::newStorageClass( DeclarationNode::Auto ); }
1304	\| REGISTER
1305	{ $$ = DeclarationNode::newStorageClass( DeclarationNode::Register ); }
1306	\| INLINE // C99
1307	{ $$ = DeclarationNode::newStorageClass( DeclarationNode::Inline ); }
1308	\| FORTRAN // C99
1309	{ $$ = DeclarationNode::newStorageClass( DeclarationNode::Fortran ); }
1310	\| NORETURN // C11
1311	{ $$ = DeclarationNode::newStorageClass( DeclarationNode::Noreturn ); }
1312	\| THREADLOCAL // C11
1313	{ $$ = DeclarationNode::newStorageClass( DeclarationNode::Threadlocal ); }
1314	;
1315
1316	basic_type_name:
1317	CHAR
1318	{ $$ = DeclarationNode::newBasicType( DeclarationNode::Char ); }
1319	\| DOUBLE
1320	{ $$ = DeclarationNode::newBasicType( DeclarationNode::Double ); }
1321	\| FLOAT
1322	{ $$ = DeclarationNode::newBasicType( DeclarationNode::Float ); }
1323	\| INT
1324	{ $$ = DeclarationNode::newBasicType( DeclarationNode::Int ); }
1325	\| LONG
1326	{ $$ = DeclarationNode::newModifier( DeclarationNode::Long ); }
1327	\| SHORT
1328	{ $$ = DeclarationNode::newModifier( DeclarationNode::Short ); }
1329	\| SIGNED
1330	{ $$ = DeclarationNode::newModifier( DeclarationNode::Signed ); }
1331	\| UNSIGNED
1332	{ $$ = DeclarationNode::newModifier( DeclarationNode::Unsigned ); }
1333	\| VOID
1334	{ $$ = DeclarationNode::newBasicType( DeclarationNode::Void ); }
1335	\| BOOL // C99
1336	{ $$ = DeclarationNode::newBasicType( DeclarationNode::Bool ); }
1337	\| COMPLEX // C99
1338	{ $$ = DeclarationNode::newBasicType( DeclarationNode::Complex ); }
1339	\| IMAGINARY // C99
1340	{ $$ = DeclarationNode::newBasicType( DeclarationNode::Imaginary ); }
1341	;
1342
1343	basic_declaration_specifier:
1344	// A semantic check is necessary for conflicting storage classes.
1345	basic_type_specifier
1346	\| declaration_qualifier_list basic_type_specifier
1347	{ $$ = $2->addQualifiers( $1 ); }
1348	\| basic_declaration_specifier storage_class // remaining OBSOLESCENT (see 2)
1349	{ $$ = $1->addQualifiers( $2 ); }
1350	\| basic_declaration_specifier storage_class type_qualifier_list
1351	{ $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
1352	\| basic_declaration_specifier storage_class basic_type_specifier
1353	{ $$ = $3->addQualifiers( $2 )->addType( $1 ); }
1354	;
1355
1356	basic_type_specifier:
1357	direct_type_name
1358	\| type_qualifier_list_opt indirect_type_name type_qualifier_list_opt
1359	{ $$ = $2->addQualifiers( $1 )->addQualifiers( $3 ); }
1360	;
1361
1362	direct_type_name:
1363	// A semantic check is necessary for conflicting type qualifiers.
1364	basic_type_name
1365	\| type_qualifier_list basic_type_name
1366	{ $$ = $2->addQualifiers( $1 ); }
1367	\| direct_type_name type_qualifier
1368	{ $$ = $1->addQualifiers( $2 ); }
1369	\| direct_type_name basic_type_name
1370	{ $$ = $1->addType( $2 ); }
1371	;
1372
1373	indirect_type_name:
1374	TYPEOF '(' type_name ')' // GCC: typeof(x) y;
1375	{ $$ = $3; }
1376	\| TYPEOF '(' comma_expression ')' // GCC: typeof(a+b) y;
1377	{ $$ = DeclarationNode::newTypeof( $3 ); }
1378	\| ATTR_TYPEGENname '(' type_name ')' // CFA: e.g., @type(x) y;
1379	{ $$ = DeclarationNode::newAttr( $1, $3 ); }
1380	\| ATTR_TYPEGENname '(' comma_expression ')' // CFA: e.g., @type(a+b) y;
1381	{ $$ = DeclarationNode::newAttr( $1, $3 ); }
1382	;
1383
1384	sue_declaration_specifier:
1385	sue_type_specifier
1386	\| declaration_qualifier_list sue_type_specifier
1387	{ $$ = $2->addQualifiers( $1 ); }
1388	\| sue_declaration_specifier storage_class // remaining OBSOLESCENT (see 2)
1389	{ $$ = $1->addQualifiers( $2 ); }
1390	\| sue_declaration_specifier storage_class type_qualifier_list
1391	{ $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
1392	;
1393
1394	sue_type_specifier:
1395	elaborated_type_name // struct, union, enum
1396	\| type_qualifier_list elaborated_type_name
1397	{ $$ = $2->addQualifiers( $1 ); }
1398	\| sue_type_specifier type_qualifier
1399	{ $$ = $1->addQualifiers( $2 ); }
1400	;
1401
1402	typedef_declaration_specifier:
1403	typedef_type_specifier
1404	\| declaration_qualifier_list typedef_type_specifier
1405	{ $$ = $2->addQualifiers( $1 ); }
1406	\| typedef_declaration_specifier storage_class // remaining OBSOLESCENT (see 2)
1407	{ $$ = $1->addQualifiers( $2 ); }
1408	\| typedef_declaration_specifier storage_class type_qualifier_list
1409	{ $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
1410	;
1411
1412	typedef_type_specifier: // typedef types
1413	TYPEDEFname
1414	{ $$ = DeclarationNode::newFromTypedef( $1 ); }
1415	\| type_qualifier_list TYPEDEFname
1416	{ $$ = DeclarationNode::newFromTypedef( $2 )->addQualifiers( $1 ); }
1417	\| typedef_type_specifier type_qualifier
1418	{ $$ = $1->addQualifiers( $2 ); }
1419	;
1420
1421	elaborated_type_name:
1422	aggregate_name
1423	\| enum_name
1424	;
1425
1426	aggregate_name:
1427	aggregate_key '{' field_declaration_list '}'
1428	{ $$ = DeclarationNode::newAggregate( $1, 0, 0, $3 ); }
1429	\| aggregate_key no_attr_identifier_or_type_name
1430	{ $$ = DeclarationNode::newAggregate( $1, $2, 0, 0 ); }
1431	\| aggregate_key no_attr_identifier_or_type_name '{' field_declaration_list '}'
1432	{ $$ = DeclarationNode::newAggregate( $1, $2, 0, $4 ); }
1433	\| aggregate_key '(' type_name_list ')' '{' field_declaration_list '}' // CFA
1434	{ $$ = DeclarationNode::newAggregate( $1, 0, $3, $6 ); }
1435	\| aggregate_key typegen_name // CFA, S/R conflict
1436	{ $$ = $2; }
1437	;
1438
1439	aggregate_key:
1440	STRUCT attribute_list_opt
1441	{ $$ = DeclarationNode::Struct; }
1442	\| UNION attribute_list_opt
1443	{ $$ = DeclarationNode::Union; }
1444	;
1445
1446	field_declaration_list:
1447	field_declaration
1448	{ $$ = $1; }
1449	\| field_declaration_list field_declaration
1450	{ $$ = $1->appendList( $2 ); }
1451	;
1452
1453	field_declaration:
1454	new_field_declaring_list ';' // CFA, new style field declaration
1455	\| EXTENSION new_field_declaring_list ';' // GCC
1456	{ $$ = $2; }
1457	\| field_declaring_list ';'
1458	\| EXTENSION field_declaring_list ';' // GCC
1459	{ $$ = $2; }
1460	;
1461
1462	new_field_declaring_list: // CFA, new style field declaration
1463	new_abstract_declarator_tuple // CFA, no field name
1464	\| new_abstract_declarator_tuple no_attr_identifier_or_type_name
1465	{ $$ = $1->addName( $2 ); }
1466	\| new_field_declaring_list ',' no_attr_identifier_or_type_name
1467	{ $$ = $1->appendList( $1->cloneType( $3 ) ); }
1468	\| new_field_declaring_list ',' // CFA, no field name
1469	{ $$ = $1->appendList( $1->cloneType( 0 ) ); }
1470	;
1471
1472	field_declaring_list:
1473	type_specifier field_declarator
1474	{ $$ = $2->addType( $1 ); }
1475	\| field_declaring_list ',' attribute_list_opt field_declarator
1476	{ $$ = $1->appendList( $1->cloneBaseType( $4 ) ); }
1477	;
1478
1479	field_declarator:
1480	// empty
1481	{ $$ = DeclarationNode::newName( 0 ); /* XXX */ } // CFA, no field name
1482	\| bit_subrange_size // no field name
1483	{ $$ = DeclarationNode::newBitfield( $1 ); }
1484	\| variable_declarator bit_subrange_size_opt
1485	// A semantic check is required to ensure bit_subrange only appears on base type int.
1486	{ $$ = $1->addBitfield( $2 ); }
1487	\| type_redeclarator bit_subrange_size_opt
1488	// A semantic check is required to ensure bit_subrange only appears on base type int.
1489	{ $$ = $1->addBitfield( $2 ); }
1490	\| variable_abstract_declarator // CFA, no field name
1491	;
1492
1493	bit_subrange_size_opt:
1494	// empty
1495	{ $$ = 0; }
1496	\| bit_subrange_size
1497	{ $$ = $1; }
1498	;
1499
1500	bit_subrange_size:
1501	':' constant_expression
1502	{ $$ = $2; }
1503	;
1504
1505	enum_key:
1506	ENUM attribute_list_opt
1507	;
1508
1509	enum_name:
1510	enum_key '{' enumerator_list comma_opt '}'
1511	{ $$ = DeclarationNode::newEnum( 0, $3 ); }
1512	\| enum_key no_attr_identifier_or_type_name '{' enumerator_list comma_opt '}'
1513	{ $$ = DeclarationNode::newEnum( $2, $4 ); }
1514	\| enum_key no_attr_identifier_or_type_name
1515	{ $$ = DeclarationNode::newEnum( $2, 0 ); }
1516	;
1517
1518	enumerator_list:
1519	no_attr_identifier_or_type_name enumerator_value_opt
1520	{ $$ = DeclarationNode::newEnumConstant( $1, $2 ); }
1521	\| enumerator_list ',' no_attr_identifier_or_type_name enumerator_value_opt
1522	{ $$ = $1->appendList( DeclarationNode::newEnumConstant( $3, $4 ) ); }
1523	;
1524
1525	enumerator_value_opt:
1526	// empty
1527	{ $$ = 0; }
1528	\| '=' constant_expression
1529	{ $$ = $2; }
1530	;
1531
1532	// Minimum of one parameter after which ellipsis is allowed only at the end.
1533
1534	new_parameter_type_list_opt: // CFA
1535	// empty
1536	{ $$ = 0; }
1537	\| new_parameter_type_list
1538	;
1539
1540	new_parameter_type_list: // CFA, abstract + real
1541	new_abstract_parameter_list
1542	\| new_parameter_list
1543	\| new_parameter_list pop ',' push new_abstract_parameter_list
1544	{ $$ = $1->appendList( $5 ); }
1545	\| new_abstract_parameter_list pop ',' push ELLIPSIS
1546	{ $$ = $1->addVarArgs(); }
1547	\| new_parameter_list pop ',' push ELLIPSIS
1548	{ $$ = $1->addVarArgs(); }
1549	;
1550
1551	new_parameter_list: // CFA
1552	// To obtain LR(1) between new_parameter_list and new_abstract_tuple, the last new_abstract_parameter_list is
1553	// factored out from new_parameter_list, flattening the rules to get lookahead to the ']'.
1554	new_parameter_declaration
1555	\| new_abstract_parameter_list pop ',' push new_parameter_declaration
1556	{ $$ = $1->appendList( $5 ); }
1557	\| new_parameter_list pop ',' push new_parameter_declaration
1558	{ $$ = $1->appendList( $5 ); }
1559	\| new_parameter_list pop ',' push new_abstract_parameter_list pop ',' push new_parameter_declaration
1560	{ $$ = $1->appendList( $5 )->appendList( $9 ); }
1561	;
1562
1563	new_abstract_parameter_list: // CFA, new & old style abstract
1564	new_abstract_parameter_declaration
1565	\| new_abstract_parameter_list pop ',' push new_abstract_parameter_declaration
1566	{ $$ = $1->appendList( $5 ); }
1567	;
1568
1569	parameter_type_list_opt:
1570	// empty
1571	{ $$ = 0; }
1572	\| parameter_type_list
1573	;
1574
1575	parameter_type_list:
1576	parameter_list
1577	\| parameter_list pop ',' push ELLIPSIS
1578	{ $$ = $1->addVarArgs(); }
1579	;
1580
1581	parameter_list: // abstract + real
1582	abstract_parameter_declaration
1583	\| parameter_declaration
1584	\| parameter_list pop ',' push abstract_parameter_declaration
1585	{ $$ = $1->appendList( $5 ); }
1586	\| parameter_list pop ',' push parameter_declaration
1587	{ $$ = $1->appendList( $5 ); }
1588	;
1589
1590	// Provides optional identifier names (abstract_declarator/variable_declarator), no initialization, different semantics
1591	// for typedef name by using type_parameter_redeclarator instead of typedef_redeclarator, and function prototypes.
1592
1593	new_parameter_declaration: // CFA, new & old style parameter declaration
1594	parameter_declaration
1595	\| new_identifier_parameter_declarator_no_tuple identifier_or_type_name assignment_opt
1596	{ $$ = $1->addName( $2 ); }
1597	\| new_abstract_tuple identifier_or_type_name assignment_opt
1598	// To obtain LR(1), these rules must be duplicated here (see new_abstract_declarator).
1599	{ $$ = $1->addName( $2 ); }
1600	\| type_qualifier_list new_abstract_tuple identifier_or_type_name assignment_opt
1601	{ $$ = $2->addName( $3 )->addQualifiers( $1 ); }
1602	\| new_function_specifier
1603	;
1604
1605	new_abstract_parameter_declaration: // CFA, new & old style parameter declaration
1606	abstract_parameter_declaration
1607	\| new_identifier_parameter_declarator_no_tuple
1608	\| new_abstract_tuple
1609	// To obtain LR(1), these rules must be duplicated here (see new_abstract_declarator).
1610	\| type_qualifier_list new_abstract_tuple
1611	{ $$ = $2->addQualifiers( $1 ); }
1612	\| new_abstract_function
1613	;
1614
1615	parameter_declaration:
1616	declaration_specifier identifier_parameter_declarator assignment_opt
1617	{
1618	typedefTable.addToEnclosingScope( TypedefTable::ID );
1619	$$ = $2->addType( $1 )->addInitializer( new InitializerNode( $3 ) );
1620	}
1621	\| declaration_specifier type_parameter_redeclarator assignment_opt
1622	{
1623	typedefTable.addToEnclosingScope( TypedefTable::ID );
1624	$$ = $2->addType( $1 )->addInitializer( new InitializerNode( $3 ) );
1625	}
1626	;
1627
1628	abstract_parameter_declaration:
1629	declaration_specifier
1630	\| declaration_specifier abstract_parameter_declarator
1631	{ $$ = $2->addType( $1 ); }
1632	;
1633
1634	// ISO/IEC 9899:1999 Section 6.9.1(6) : "An identifier declared as a typedef name shall not be redeclared as a
1635	// parameter." Because the scope of the K&R-style parameter-list sees the typedef first, the following is based only on
1636	// identifiers. The ANSI-style parameter-list can redefine a typedef name.
1637
1638	identifier_list: // K&R-style parameter list => no types
1639	no_attr_identifier
1640	{ $$ = DeclarationNode::newName( $1 ); }
1641	\| identifier_list ',' no_attr_identifier
1642	{ $$ = $1->appendList( DeclarationNode::newName( $3 ) ); }
1643	;
1644
1645	identifier_or_type_name:
1646	identifier
1647	\| TYPEDEFname
1648	\| TYPEGENname
1649	;
1650
1651	no_01_identifier_or_type_name:
1652	no_01_identifier
1653	\| TYPEDEFname
1654	\| TYPEGENname
1655	;
1656
1657	no_attr_identifier_or_type_name:
1658	no_attr_identifier
1659	\| TYPEDEFname
1660	\| TYPEGENname
1661	;
1662
1663	type_name_no_function: // sizeof, alignof, cast (constructor)
1664	new_abstract_declarator_tuple // CFA
1665	\| type_specifier
1666	\| type_specifier variable_abstract_declarator
1667	{ $$ = $2->addType( $1 ); }
1668	;
1669
1670	type_name: // typeof, assertion
1671	new_abstract_declarator_tuple // CFA
1672	\| new_abstract_function // CFA
1673	\| type_specifier
1674	\| type_specifier abstract_declarator
1675	{ $$ = $2->addType( $1 ); }
1676	;
1677
1678	initializer_opt:
1679	// empty
1680	{ $$ = 0; }
1681	\| '=' initializer
1682	{ $$ = $2; }
1683	\| ATassign initializer
1684	{ $$ = $2; }
1685	;
1686
1687	initializer:
1688	assignment_expression { $$ = new InitializerNode( $1 ); }
1689	\| '{' initializer_list comma_opt '}' { $$ = new InitializerNode( $2, true ); }
1690	;
1691
1692	initializer_list:
1693	// empty
1694	{ $$ = 0; }
1695	\| initializer
1696	\| designation initializer { $$ = $2->set_designators( $1 ); }
1697	\| initializer_list ',' initializer { $$ = (InitializerNode *)( $1->set_link( $3 ) ); }
1698	\| initializer_list ',' designation initializer
1699	{ $$ = (InitializerNode *)( $1->set_link( $4->set_designators( $3 ) ) ); }
1700	;
1701
1702	// There is an unreconcileable parsing problem between C99 and CFA with respect to designators. The problem is use of
1703	// '=' to separator the designator from the initializer value, as in:
1704	//
1705	// int x[10] = { [1] = 3 };
1706	//
1707	// The string "[1] = 3" can be parsed as a designator assignment or a tuple assignment. To disambiguate this case, CFA
1708	// changes the syntax from "=" to ":" as the separator between the designator and initializer. GCC does uses ":" for
1709	// field selection. The optional use of the "=" in GCC, or in this case ":", cannot be supported either due to
1710	// shift/reduce conflicts
1711
1712	designation:
1713	designator_list ':' // C99, CFA uses ":" instead of "="
1714	\| no_attr_identifier_or_type_name ':' // GCC, field name
1715	{ $$ = new VarRefNode( $1 ); }
1716	;
1717
1718	designator_list: // C99
1719	designator
1720	\| designator_list designator
1721	{ $$ = (ExpressionNode *)( $1->set_link( $2 )); }
1722	//\| designator_list designator { $$ = new CompositeExprNode( $1, $2 ); }
1723	;
1724
1725	designator:
1726	// lexer ambiguity: designator ".0" is floating-point constant or designator for name 0
1727	// only ".0" and ".1" allowed => semantic check
1728	FLOATINGconstant
1729	{ $$ = new DesignatorNode( new VarRefNode( $1 ) ); }
1730	\| '.' no_attr_identifier_or_type_name // C99, field name
1731	{ $$ = new DesignatorNode( new VarRefNode( $2 ) ); }
1732	\| '[' push assignment_expression pop ']' // C99, single array element
1733	// assignment_expression used instead of constant_expression because of shift/reduce conflicts with tuple.
1734	{ $$ = new DesignatorNode( $3, true ); }
1735	\| '[' push subrange pop ']' // CFA, multiple array elements
1736	{ $$ = new DesignatorNode( $3, true ); }
1737	\| '[' push constant_expression ELLIPSIS constant_expression pop ']' // GCC, multiple array elements
1738	{ $$ = new DesignatorNode( new CompositeExprNode( new OperatorNode( OperatorNode::Range ), $3, $5 ), true ); }
1739	\| '.' '[' push field_list pop ']' // CFA, tuple field selector
1740	{ $$ = new DesignatorNode( $4 ); }
1741	;
1742
1743	// The CFA type system is based on parametric polymorphism, the ability to declare functions with type parameters,
1744	// rather than an object-oriented type system. This required four groups of extensions:
1745	//
1746	// Overloading: function, data, and operator identifiers may be overloaded.
1747	//
1748	// Type declarations: "type" is used to generate new types for declaring objects. Similarly, "dtype" is used for object
1749	// and incomplete types, and "ftype" is used for function types. Type declarations with initializers provide
1750	// definitions of new types. Type declarations with storage class "extern" provide opaque types.
1751	//
1752	// Polymorphic functions: A forall clause declares a type parameter. The corresponding argument is inferred at the call
1753	// site. A polymorphic function is not a template; it is a function, with an address and a type.
1754	//
1755	// Specifications and Assertions: Specifications are collections of declarations parameterized by one or more
1756	// types. They serve many of the purposes of abstract classes, and specification hierarchies resemble subclass
1757	// hierarchies. Unlike classes, they can define relationships between types. Assertions declare that a type or
1758	// types provide the operations declared by a specification. Assertions are normally used to declare requirements
1759	// on type arguments of polymorphic functions.
1760
1761	typegen_declaration_specifier: // CFA
1762	typegen_type_specifier
1763	\| declaration_qualifier_list typegen_type_specifier
1764	{ $$ = $2->addQualifiers( $1 ); }
1765	\| typegen_declaration_specifier storage_class // remaining OBSOLESCENT (see 2)
1766	{ $$ = $1->addQualifiers( $2 ); }
1767	\| typegen_declaration_specifier storage_class type_qualifier_list
1768	{ $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
1769	;
1770
1771	typegen_type_specifier: // CFA
1772	typegen_name
1773	\| type_qualifier_list typegen_name
1774	{ $$ = $2->addQualifiers( $1 ); }
1775	\| typegen_type_specifier type_qualifier
1776	{ $$ = $1->addQualifiers( $2 ); }
1777	;
1778
1779	typegen_name: // CFA
1780	TYPEGENname '(' type_name_list ')'
1781	{ $$ = DeclarationNode::newFromTypeGen( $1, $3 ); }
1782	;
1783
1784	type_parameter_list: // CFA
1785	type_parameter assignment_opt
1786	\| type_parameter_list ',' type_parameter assignment_opt
1787	{ $$ = $1->appendList( $3 ); }
1788	;
1789
1790	type_parameter: // CFA
1791	type_class no_attr_identifier_or_type_name
1792	{ typedefTable.addToEnclosingScope( *$2, TypedefTable::TD ); }
1793	assertion_list_opt
1794	{ $$ = DeclarationNode::newTypeParam( $1, $2 )->addAssertions( $4 ); }
1795	\| type_specifier identifier_parameter_declarator
1796	;
1797
1798	type_class: // CFA
1799	TYPE
1800	{ $$ = DeclarationNode::Type; }
1801	\| DTYPE
1802	{ $$ = DeclarationNode::Ftype; }
1803	\| FTYPE
1804	{ $$ = DeclarationNode::Dtype; }
1805	;
1806
1807	assertion_list_opt: // CFA
1808	// empty
1809	{ $$ = 0; }
1810	\| assertion_list_opt assertion
1811	{ $$ = $1 == 0 ? $2 : $1->appendList( $2 ); }
1812	;
1813
1814	assertion: // CFA
1815	'\|' no_attr_identifier_or_type_name '(' type_name_list ')'
1816	{
1817	typedefTable.openContext( *$2 );
1818	$$ = DeclarationNode::newContextUse( $2, $4 );
1819	}
1820	\| '\|' '{' push context_declaration_list '}'
1821	{ $$ = $4; }
1822	\| '\|' '(' push type_parameter_list pop ')' '{' push context_declaration_list '}' '(' type_name_list ')'
1823	{ $$ = 0; }
1824	;
1825
1826	type_name_list: // CFA
1827	type_name
1828	{ $$ = new TypeValueNode( $1 ); }
1829	\| assignment_expression
1830	\| type_name_list ',' type_name
1831	{ $$ = (ExpressionNode *)( $1->set_link( new TypeValueNode( $3 ))); }
1832	\| type_name_list ',' assignment_expression
1833	{ $$ = (ExpressionNode *)( $1->set_link( $3 )); }
1834	;
1835
1836	type_declaring_list: // CFA
1837	TYPE type_declarator
1838	{ $$ = $2; }
1839	\| storage_class_list TYPE type_declarator
1840	{ $$ = $3->addQualifiers( $1 ); }
1841	\| type_declaring_list ',' type_declarator
1842	{ $$ = $1->appendList( $3->copyStorageClasses( $1 ) ); }
1843	;
1844
1845	type_declarator: // CFA
1846	type_declarator_name assertion_list_opt
1847	{ $$ = $1->addAssertions( $2 ); }
1848	\| type_declarator_name assertion_list_opt '=' type_name
1849	{ $$ = $1->addAssertions( $2 )->addType( $4 ); }
1850	;
1851
1852	type_declarator_name: // CFA
1853	no_attr_identifier_or_type_name
1854	{
1855	typedefTable.addToEnclosingScope( *$1, TypedefTable::TD );
1856	$$ = DeclarationNode::newTypeDecl( $1, 0 );
1857	}
1858	\| no_01_identifier_or_type_name '(' push type_parameter_list pop ')'
1859	{
1860	typedefTable.addToEnclosingScope( *$1, TypedefTable::TG );
1861	$$ = DeclarationNode::newTypeDecl( $1, $4 );
1862	}
1863	;
1864
1865	context_specifier: // CFA
1866	CONTEXT no_attr_identifier_or_type_name '(' push type_parameter_list pop ')' '{' '}'
1867	{
1868	typedefTable.addToEnclosingScope( *$2, TypedefTable::ID );
1869	$$ = DeclarationNode::newContext( $2, $5, 0 );
1870	}
1871	\| CONTEXT no_attr_identifier_or_type_name '(' push type_parameter_list pop ')' '{'
1872	{
1873	typedefTable.enterContext( *$2 );
1874	typedefTable.enterScope();
1875	}
1876	context_declaration_list '}'
1877	{
1878	typedefTable.leaveContext();
1879	typedefTable.addToEnclosingScope( *$2, TypedefTable::ID );
1880	$$ = DeclarationNode::newContext( $2, $5, $10 );
1881	}
1882	;
1883
1884	context_declaration_list: // CFA
1885	context_declaration
1886	\| context_declaration_list push context_declaration
1887	{ $$ = $1->appendList( $3 ); }
1888	;
1889
1890	context_declaration: // CFA
1891	new_context_declaring_list pop ';'
1892	\| context_declaring_list pop ';'
1893	;
1894
1895	new_context_declaring_list: // CFA
1896	new_variable_specifier
1897	{
1898	typedefTable.addToEnclosingScope2( TypedefTable::ID );
1899	$$ = $1;
1900	}
1901	\| new_function_specifier
1902	{
1903	typedefTable.addToEnclosingScope2( TypedefTable::ID );
1904	$$ = $1;
1905	}
1906	\| new_context_declaring_list pop ',' push identifier_or_type_name
1907	{
1908	typedefTable.addToEnclosingScope2( *$5, TypedefTable::ID );
1909	$$ = $1->appendList( $1->cloneType( $5 ) );
1910	}
1911	;
1912
1913	context_declaring_list: // CFA
1914	type_specifier declarator
1915	{
1916	typedefTable.addToEnclosingScope2( TypedefTable::ID );
1917	$$ = $2->addType( $1 );
1918	}
1919	\| context_declaring_list pop ',' push declarator
1920	{
1921	typedefTable.addToEnclosingScope2( TypedefTable::ID );
1922	$$ = $1->appendList( $1->cloneBaseType( $5 ) );
1923	}
1924	;
1925
1926	//*************************** EXTERNAL DEFINITIONS ***************************
1927
1928	translation_unit:
1929	// empty
1930	{} // empty input file
1931	\| external_definition_list
1932	{
1933	if ( theTree ) {
1934	theTree->appendList( $1 );
1935	} else {
1936	theTree = $1;
1937	}
1938	}
1939	;
1940
1941	external_definition_list:
1942	external_definition
1943	\| external_definition_list push external_definition
1944	{ $$ = ( $1 != NULL ) ? $1->appendList( $3 ) : $3; }
1945	;
1946
1947	external_definition_list_opt:
1948	// empty
1949	{ $$ = 0; }
1950	\| external_definition_list
1951	;
1952
1953	external_definition:
1954	declaration
1955	\| external_function_definition
1956	\| asm_statement // GCC, global assembler statement
1957	{}
1958	\| EXTERN STRINGliteral
1959	{
1960	linkageStack.push( linkage );
1961	linkage = LinkageSpec::fromString( *$2 );
1962	}
1963	'{' external_definition_list_opt '}' // C++-style linkage specifier
1964	{
1965	linkage = linkageStack.top();
1966	linkageStack.pop();
1967	$$ = $5;
1968	}
1969	\| EXTENSION external_definition
1970	{ $$ = $2; }
1971	;
1972
1973	external_function_definition:
1974	function_definition
1975	// These rules are a concession to the "implicit int" type_specifier because there is a significant amount of
1976	// code with functions missing a type-specifier on the return type. Parsing is possible because
1977	// function_definition does not appear in the context of an expression (nested functions would preclude this
1978	// concession). A function prototype declaration must still have a type_specifier. OBSOLESCENT (see 1)
1979	\| function_declarator compound_statement
1980	{
1981	typedefTable.addToEnclosingScope( TypedefTable::ID );
1982	typedefTable.leaveScope();
1983	$$ = $1->addFunctionBody( $2 );
1984	}
1985	\| old_function_declarator push old_declaration_list_opt compound_statement
1986	{
1987	typedefTable.addToEnclosingScope( TypedefTable::ID );
1988	typedefTable.leaveScope();
1989	$$ = $1->addOldDeclList( $3 )->addFunctionBody( $4 );
1990	}
1991	;
1992
1993	function_definition:
1994	new_function_declaration compound_statement // CFA
1995	{
1996	typedefTable.addToEnclosingScope( TypedefTable::ID );
1997	typedefTable.leaveScope();
1998	$$ = $1->addFunctionBody( $2 );
1999	}
2000	\| declaration_specifier function_declarator compound_statement
2001	{
2002	typedefTable.addToEnclosingScope( TypedefTable::ID );
2003	typedefTable.leaveScope();
2004	$$ = $2->addFunctionBody( $3 )->addType( $1 );
2005	}
2006	\| type_qualifier_list function_declarator compound_statement
2007	{
2008	typedefTable.addToEnclosingScope( TypedefTable::ID );
2009	typedefTable.leaveScope();
2010	$$ = $2->addFunctionBody( $3 )->addQualifiers( $1 );
2011	}
2012	\| declaration_qualifier_list function_declarator compound_statement
2013	{
2014	typedefTable.addToEnclosingScope( TypedefTable::ID );
2015	typedefTable.leaveScope();
2016	$$ = $2->addFunctionBody( $3 )->addQualifiers( $1 );
2017	}
2018	\| declaration_qualifier_list type_qualifier_list function_declarator compound_statement
2019	{
2020	typedefTable.addToEnclosingScope( TypedefTable::ID );
2021	typedefTable.leaveScope();
2022	$$ = $3->addFunctionBody( $4 )->addQualifiers( $2 )->addQualifiers( $1 );
2023	}
2024
2025	// Old-style K&R function definition, OBSOLESCENT (see 4)
2026	\| declaration_specifier old_function_declarator push old_declaration_list_opt compound_statement
2027	{
2028	typedefTable.addToEnclosingScope( TypedefTable::ID );
2029	typedefTable.leaveScope();
2030	$$ = $2->addOldDeclList( $4 )->addFunctionBody( $5 )->addType( $1 );
2031	}
2032	\| type_qualifier_list old_function_declarator push old_declaration_list_opt compound_statement
2033	{
2034	typedefTable.addToEnclosingScope( TypedefTable::ID );
2035	typedefTable.leaveScope();
2036	$$ = $2->addOldDeclList( $4 )->addFunctionBody( $5 )->addQualifiers( $1 );
2037	}
2038
2039	// Old-style K&R function definition with "implicit int" type_specifier, OBSOLESCENT (see 4)
2040	\| declaration_qualifier_list old_function_declarator push old_declaration_list_opt compound_statement
2041	{
2042	typedefTable.addToEnclosingScope( TypedefTable::ID );
2043	typedefTable.leaveScope();
2044	$$ = $2->addOldDeclList( $4 )->addFunctionBody( $5 )->addQualifiers( $1 );
2045	}
2046	\| declaration_qualifier_list type_qualifier_list old_function_declarator push old_declaration_list_opt compound_statement
2047	{
2048	typedefTable.addToEnclosingScope( TypedefTable::ID );
2049	typedefTable.leaveScope();
2050	$$ = $3->addOldDeclList( $5 )->addFunctionBody( $6 )->addQualifiers( $2 )->addQualifiers( $1 );
2051	}
2052	;
2053
2054	declarator:
2055	variable_declarator
2056	\| function_declarator
2057	\| type_redeclarator
2058	;
2059
2060	subrange:
2061	constant_expression '~' constant_expression // CFA, integer subrange
2062	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::Range ), $1, $3 ); }
2063	;
2064
2065	asm_name_opt: // GCC
2066	// empty
2067	\| ASM '(' string_literal_list ')' attribute_list_opt
2068	;
2069
2070	attribute_list_opt: // GCC
2071	// empty
2072	{ $$ = 0; }
2073	\| attribute_list
2074	;
2075
2076	attribute_list: // GCC
2077	attribute
2078	\| attribute_list attribute
2079	{ $$ = $2->addQualifiers( $1 ); }
2080	;
2081
2082	attribute: // GCC
2083	ATTRIBUTE '(' '(' attribute_parameter_list ')' ')'
2084	// { $$ = DeclarationNode::newQualifier( DeclarationNode::Attribute ); }
2085	{ $$ = 0; }
2086	;
2087
2088	attribute_parameter_list: // GCC
2089	attrib
2090	\| attribute_parameter_list ',' attrib
2091	;
2092
2093	attrib: // GCC
2094	// empty
2095	\| any_word
2096	\| any_word '(' comma_expression_opt ')'
2097	;
2098
2099	any_word: // GCC
2100	identifier_or_type_name {}
2101	\| storage_class_name {}
2102	\| basic_type_name {}
2103	\| type_qualifier {}
2104	;
2105
2106	// ============================================================================
2107	// The following sections are a series of grammar patterns used to parse declarators. Multiple patterns are necessary
2108	// because the type of an identifier in wrapped around the identifier in the same form as its usage in an expression, as
2109	// in:
2110	//
2111	// int (*f())[10] { ... };
2112	// ... (*f())[3] += 1; // definition mimics usage
2113	//
2114	// Because these patterns are highly recursive, changes at a lower level in the recursion require copying some or all of
2115	// the pattern. Each of these patterns has some subtle variation to ensure correct syntax in a particular context.
2116	// ============================================================================
2117
2118	// ----------------------------------------------------------------------------
2119	// The set of valid declarators before a compound statement for defining a function is less than the set of declarators
2120	// to define a variable or function prototype, e.g.:
2121	//
2122	// valid declaration invalid definition
2123	// ----------------- ------------------
2124	// int f; int f {}
2125	// int f; int f {}
2126	// int f[10]; int f[10] {}
2127	// int (f)(int); int (f)(int) {}
2128	//
2129	// To preclude this syntactic anomaly requires separating the grammar rules for variable and function declarators, hence
2130	// variable_declarator and function_declarator.
2131	// ----------------------------------------------------------------------------
2132
2133	// This pattern parses a declaration of a variable that is not redefining a typedef name. The pattern precludes
2134	// declaring an array of functions versus a pointer to an array of functions.
2135
2136	variable_declarator:
2137	paren_identifier attribute_list_opt
2138	{ $$ = $1->addQualifiers( $2 ); }
2139	\| variable_ptr
2140	\| variable_array attribute_list_opt
2141	{ $$ = $1->addQualifiers( $2 ); }
2142	\| variable_function attribute_list_opt
2143	{ $$ = $1->addQualifiers( $2 ); }
2144	;
2145
2146	paren_identifier:
2147	identifier
2148	{
2149	typedefTable.setNextIdentifier( *$1 );
2150	$$ = DeclarationNode::newName( $1 );
2151	}
2152	\| '(' paren_identifier ')' // redundant parenthesis
2153	{ $$ = $2; }
2154	;
2155
2156	variable_ptr:
2157	'*' variable_declarator
2158	{ $$ = $2->addPointer( DeclarationNode::newPointer( 0 ) ); }
2159	\| '*' type_qualifier_list variable_declarator
2160	{ $$ = $3->addPointer( DeclarationNode::newPointer( $2 ) ); }
2161	\| '(' variable_ptr ')'
2162	{ $$ = $2; }
2163	;
2164
2165	variable_array:
2166	paren_identifier array_dimension
2167	{ $$ = $1->addArray( $2 ); }
2168	\| '(' variable_ptr ')' array_dimension
2169	{ $$ = $2->addArray( $4 ); }
2170	\| '(' variable_array ')' multi_array_dimension // redundant parenthesis
2171	{ $$ = $2->addArray( $4 ); }
2172	\| '(' variable_array ')' // redundant parenthesis
2173	{ $$ = $2; }
2174	;
2175
2176	variable_function:
2177	'(' variable_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2178	{ $$ = $2->addParamList( $6 ); }
2179	\| '(' variable_function ')' // redundant parenthesis
2180	{ $$ = $2; }
2181	;
2182
2183	// This pattern parses a function declarator that is not redefining a typedef name. Because functions cannot be nested,
2184	// there is no context where a function definition can redefine a typedef name. To allow nested functions requires
2185	// further separation of variable and function declarators in type_redeclarator. The pattern precludes returning
2186	// arrays and functions versus pointers to arrays and functions.
2187
2188	function_declarator:
2189	function_no_ptr attribute_list_opt
2190	{ $$ = $1->addQualifiers( $2 ); }
2191	\| function_ptr
2192	\| function_array attribute_list_opt
2193	{ $$ = $1->addQualifiers( $2 ); }
2194	;
2195
2196	function_no_ptr:
2197	paren_identifier '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2198	{ $$ = $1->addParamList( $4 ); }
2199	\| '(' function_ptr ')' '(' push parameter_type_list_opt pop ')'
2200	{ $$ = $2->addParamList( $6 ); }
2201	\| '(' function_no_ptr ')' // redundant parenthesis
2202	{ $$ = $2; }
2203	;
2204
2205	function_ptr:
2206	'*' function_declarator
2207	{ $$ = $2->addPointer( DeclarationNode::newPointer( 0 ) ); }
2208	\| '*' type_qualifier_list function_declarator
2209	{ $$ = $3->addPointer( DeclarationNode::newPointer( $2 ) ); }
2210	\| '(' function_ptr ')'
2211	{ $$ = $2; }
2212	;
2213
2214	function_array:
2215	'(' function_ptr ')' array_dimension
2216	{ $$ = $2->addArray( $4 ); }
2217	\| '(' function_array ')' multi_array_dimension // redundant parenthesis
2218	{ $$ = $2->addArray( $4 ); }
2219	\| '(' function_array ')' // redundant parenthesis
2220	{ $$ = $2; }
2221	;
2222
2223	// This pattern parses an old-style K&R function declarator (OBSOLESCENT, see 4) that is not redefining a typedef name
2224	// (see function_declarator for additional comments). The pattern precludes returning arrays and functions versus
2225	// pointers to arrays and functions.
2226
2227	old_function_declarator:
2228	old_function_no_ptr
2229	\| old_function_ptr
2230	\| old_function_array
2231	;
2232
2233	old_function_no_ptr:
2234	paren_identifier '(' identifier_list ')' // function_declarator handles empty parameter
2235	{ $$ = $1->addIdList( $3 ); }
2236	\| '(' old_function_ptr ')' '(' identifier_list ')'
2237	{ $$ = $2->addIdList( $5 ); }
2238	\| '(' old_function_no_ptr ')' // redundant parenthesis
2239	{ $$ = $2; }
2240	;
2241
2242	old_function_ptr:
2243	'*' old_function_declarator
2244	{ $$ = $2->addPointer( DeclarationNode::newPointer( 0 ) ); }
2245	\| '*' type_qualifier_list old_function_declarator
2246	{ $$ = $3->addPointer( DeclarationNode::newPointer( $2 ) ); }
2247	\| '(' old_function_ptr ')'
2248	{ $$ = $2; }
2249	;
2250
2251	old_function_array:
2252	'(' old_function_ptr ')' array_dimension
2253	{ $$ = $2->addArray( $4 ); }
2254	\| '(' old_function_array ')' multi_array_dimension // redundant parenthesis
2255	{ $$ = $2->addArray( $4 ); }
2256	\| '(' old_function_array ')' // redundant parenthesis
2257	{ $$ = $2; }
2258	;
2259
2260	// This pattern parses a declaration for a variable or function prototype that redefines a type name, e.g.:
2261	//
2262	// typedef int foo;
2263	// {
2264	// int foo; // redefine typedef name in new scope
2265	// }
2266	//
2267	// The pattern precludes declaring an array of functions versus a pointer to an array of functions, and returning arrays
2268	// and functions versus pointers to arrays and functions.
2269
2270	type_redeclarator:
2271	paren_type attribute_list_opt
2272	{ $$ = $1->addQualifiers( $2 ); }
2273	\| type_ptr
2274	\| type_array attribute_list_opt
2275	{ $$ = $1->addQualifiers( $2 ); }
2276	\| type_function attribute_list_opt
2277	{ $$ = $1->addQualifiers( $2 ); }
2278	;
2279
2280	paren_type:
2281	typedef
2282	\| '(' paren_type ')'
2283	{ $$ = $2; }
2284	;
2285
2286	type_ptr:
2287	'*' type_redeclarator
2288	{ $$ = $2->addPointer( DeclarationNode::newPointer( 0 ) ); }
2289	\| '*' type_qualifier_list type_redeclarator
2290	{ $$ = $3->addPointer( DeclarationNode::newPointer( $2 ) ); }
2291	\| '(' type_ptr ')'
2292	{ $$ = $2; }
2293	;
2294
2295	type_array:
2296	paren_type array_dimension
2297	{ $$ = $1->addArray( $2 ); }
2298	\| '(' type_ptr ')' array_dimension
2299	{ $$ = $2->addArray( $4 ); }
2300	\| '(' type_array ')' multi_array_dimension // redundant parenthesis
2301	{ $$ = $2->addArray( $4 ); }
2302	\| '(' type_array ')' // redundant parenthesis
2303	{ $$ = $2; }
2304	;
2305
2306	type_function:
2307	paren_type '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2308	{ $$ = $1->addParamList( $4 ); }
2309	\| '(' type_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2310	{ $$ = $2->addParamList( $6 ); }
2311	\| '(' type_function ')' // redundant parenthesis
2312	{ $$ = $2; }
2313	;
2314
2315	// This pattern parses a declaration for a parameter variable or function prototype that is not redefining a typedef
2316	// name and allows the C99 array options, which can only appear in a parameter list. The pattern precludes declaring an
2317	// array of functions versus a pointer to an array of functions, and returning arrays and functions versus pointers to
2318	// arrays and functions.
2319
2320	identifier_parameter_declarator:
2321	paren_identifier attribute_list_opt
2322	{ $$ = $1->addQualifiers( $2 ); }
2323	\| identifier_parameter_ptr
2324	\| identifier_parameter_array attribute_list_opt
2325	{ $$ = $1->addQualifiers( $2 ); }
2326	\| identifier_parameter_function attribute_list_opt
2327	{ $$ = $1->addQualifiers( $2 ); }
2328	;
2329
2330	identifier_parameter_ptr:
2331	'*' identifier_parameter_declarator
2332	{ $$ = $2->addPointer( DeclarationNode::newPointer( 0 ) ); }
2333	\| '*' type_qualifier_list identifier_parameter_declarator
2334	{ $$ = $3->addPointer( DeclarationNode::newPointer( $2 ) ); }
2335	\| '(' identifier_parameter_ptr ')'
2336	{ $$ = $2; }
2337	;
2338
2339	identifier_parameter_array:
2340	paren_identifier array_parameter_dimension
2341	{ $$ = $1->addArray( $2 ); }
2342	\| '(' identifier_parameter_ptr ')' array_dimension
2343	{ $$ = $2->addArray( $4 ); }
2344	\| '(' identifier_parameter_array ')' multi_array_dimension // redundant parenthesis
2345	{ $$ = $2->addArray( $4 ); }
2346	\| '(' identifier_parameter_array ')' // redundant parenthesis
2347	{ $$ = $2; }
2348	;
2349
2350	identifier_parameter_function:
2351	paren_identifier '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2352	{ $$ = $1->addParamList( $4 ); }
2353	\| '(' identifier_parameter_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2354	{ $$ = $2->addParamList( $6 ); }
2355	\| '(' identifier_parameter_function ')' // redundant parenthesis
2356	{ $$ = $2; }
2357	;
2358
2359	// This pattern parses a declaration for a parameter variable or function prototype that is redefining a typedef name,
2360	// e.g.:
2361	//
2362	// typedef int foo;
2363	// int f( int foo ); // redefine typedef name in new scope
2364	//
2365	// and allows the C99 array options, which can only appear in a parameter list. In addition, the pattern handles the
2366	// special meaning of parenthesis around a typedef name:
2367	//
2368	// ISO/IEC 9899:1999 Section 6.7.5.3(11) : "In a parameter declaration, a single typedef name in
2369	// parentheses is taken to be an abstract declarator that specifies a function with a single parameter,
2370	// not as redundant parentheses around the identifier."
2371	//
2372	// which precludes the following cases:
2373	//
2374	// typedef float T;
2375	// int f( int ( T [5] ) ); // see abstract_parameter_declarator
2376	// int g( int ( T ( int ) ) ); // see abstract_parameter_declarator
2377	// int f( int f1( T a[5] ) ); // see identifier_parameter_declarator
2378	// int g( int g1( T g2( int p ) ) ); // see identifier_parameter_declarator
2379	//
2380	// In essence, a '(' immediately to the left of typedef name, T, is interpreted as starting a parameter type list, and
2381	// not as redundant parentheses around a redeclaration of T. Finally, the pattern also precludes declaring an array of
2382	// functions versus a pointer to an array of functions, and returning arrays and functions versus pointers to arrays and
2383	// functions.
2384
2385	type_parameter_redeclarator:
2386	typedef attribute_list_opt
2387	{ $$ = $1->addQualifiers( $2 ); }
2388	\| type_parameter_ptr
2389	\| type_parameter_array attribute_list_opt
2390	{ $$ = $1->addQualifiers( $2 ); }
2391	\| type_parameter_function attribute_list_opt
2392	{ $$ = $1->addQualifiers( $2 ); }
2393	;
2394
2395	typedef:
2396	TYPEDEFname
2397	{
2398	typedefTable.setNextIdentifier( *$1 );
2399	$$ = DeclarationNode::newName( $1 );
2400	}
2401	\| TYPEGENname
2402	{
2403	typedefTable.setNextIdentifier( *$1 );
2404	$$ = DeclarationNode::newName( $1 );
2405	}
2406	;
2407
2408	type_parameter_ptr:
2409	'*' type_parameter_redeclarator
2410	{ $$ = $2->addPointer( DeclarationNode::newPointer( 0 ) ); }
2411	\| '*' type_qualifier_list type_parameter_redeclarator
2412	{ $$ = $3->addPointer( DeclarationNode::newPointer( $2 ) ); }
2413	\| '(' type_parameter_ptr ')'
2414	{ $$ = $2; }
2415	;
2416
2417	type_parameter_array:
2418	typedef array_parameter_dimension
2419	{ $$ = $1->addArray( $2 ); }
2420	\| '(' type_parameter_ptr ')' array_parameter_dimension
2421	{ $$ = $2->addArray( $4 ); }
2422	;
2423
2424	type_parameter_function:
2425	typedef '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2426	{ $$ = $1->addParamList( $4 ); }
2427	\| '(' type_parameter_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2428	{ $$ = $2->addParamList( $6 ); }
2429	;
2430
2431	// This pattern parses a declaration of an abstract variable or function prototype, i.e., there is no identifier to
2432	// which the type applies, e.g.:
2433	//
2434	// sizeof( int );
2435	// sizeof( int [10] );
2436	//
2437	// The pattern precludes declaring an array of functions versus a pointer to an array of functions, and returning arrays
2438	// and functions versus pointers to arrays and functions.
2439
2440	abstract_declarator:
2441	abstract_ptr
2442	\| abstract_array attribute_list_opt
2443	{ $$ = $1->addQualifiers( $2 ); }
2444	\| abstract_function attribute_list_opt
2445	{ $$ = $1->addQualifiers( $2 ); }
2446	;
2447
2448	abstract_ptr:
2449	'*'
2450	{ $$ = DeclarationNode::newPointer( 0 ); }
2451	\| '*' type_qualifier_list
2452	{ $$ = DeclarationNode::newPointer( $2 ); }
2453	\| '*' abstract_declarator
2454	{ $$ = $2->addPointer( DeclarationNode::newPointer( 0 ) ); }
2455	\| '*' type_qualifier_list abstract_declarator
2456	{ $$ = $3->addPointer( DeclarationNode::newPointer( $2 ) ); }
2457	\| '(' abstract_ptr ')'
2458	{ $$ = $2; }
2459	;
2460
2461	abstract_array:
2462	array_dimension
2463	\| '(' abstract_ptr ')' array_dimension
2464	{ $$ = $2->addArray( $4 ); }
2465	\| '(' abstract_array ')' multi_array_dimension // redundant parenthesis
2466	{ $$ = $2->addArray( $4 ); }
2467	\| '(' abstract_array ')' // redundant parenthesis
2468	{ $$ = $2; }
2469	;
2470
2471	abstract_function:
2472	'(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2473	{ $$ = DeclarationNode::newFunction( 0, 0, $3, 0 ); }
2474	\| '(' abstract_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2475	{ $$ = $2->addParamList( $6 ); }
2476	\| '(' abstract_function ')' // redundant parenthesis
2477	{ $$ = $2; }
2478	;
2479
2480	array_dimension:
2481	// Only the first dimension can be empty.
2482	'[' ']'
2483	{ $$ = DeclarationNode::newArray( 0, 0, false ); }
2484	\| '[' ']' multi_array_dimension
2485	{ $$ = DeclarationNode::newArray( 0, 0, false )->addArray( $3 ); }
2486	\| multi_array_dimension
2487	;
2488
2489	multi_array_dimension:
2490	'[' push assignment_expression pop ']'
2491	{ $$ = DeclarationNode::newArray( $3, 0, false ); }
2492	\| '[' push '*' pop ']' // C99
2493	{ $$ = DeclarationNode::newVarArray( 0 ); }
2494	\| multi_array_dimension '[' push assignment_expression pop ']'
2495	{ $$ = $1->addArray( DeclarationNode::newArray( $4, 0, false ) ); }
2496	\| multi_array_dimension '[' push '*' pop ']' // C99
2497	{ $$ = $1->addArray( DeclarationNode::newVarArray( 0 ) ); }
2498	;
2499
2500	// This pattern parses a declaration of a parameter abstract variable or function prototype, i.e., there is no
2501	// identifier to which the type applies, e.g.:
2502	//
2503	// int f( int ); // abstract variable parameter; no parameter name specified
2504	// int f( int (int) ); // abstract function-prototype parameter; no parameter name specified
2505	//
2506	// The pattern precludes declaring an array of functions versus a pointer to an array of functions, and returning arrays
2507	// and functions versus pointers to arrays and functions.
2508
2509	abstract_parameter_declarator:
2510	abstract_parameter_ptr
2511	\| abstract_parameter_array attribute_list_opt
2512	{ $$ = $1->addQualifiers( $2 ); }
2513	\| abstract_parameter_function attribute_list_opt
2514	{ $$ = $1->addQualifiers( $2 ); }
2515	;
2516
2517	abstract_parameter_ptr:
2518	'*'
2519	{ $$ = DeclarationNode::newPointer( 0 ); }
2520	\| '*' type_qualifier_list
2521	{ $$ = DeclarationNode::newPointer( $2 ); }
2522	\| '*' abstract_parameter_declarator
2523	{ $$ = $2->addPointer( DeclarationNode::newPointer( 0 ) ); }
2524	\| '*' type_qualifier_list abstract_parameter_declarator
2525	{ $$ = $3->addPointer( DeclarationNode::newPointer( $2 ) ); }
2526	\| '(' abstract_parameter_ptr ')'
2527	{ $$ = $2; }
2528	;
2529
2530	abstract_parameter_array:
2531	array_parameter_dimension
2532	\| '(' abstract_parameter_ptr ')' array_parameter_dimension
2533	{ $$ = $2->addArray( $4 ); }
2534	\| '(' abstract_parameter_array ')' multi_array_dimension // redundant parenthesis
2535	{ $$ = $2->addArray( $4 ); }
2536	\| '(' abstract_parameter_array ')' // redundant parenthesis
2537	{ $$ = $2; }
2538	;
2539
2540	abstract_parameter_function:
2541	'(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2542	{ $$ = DeclarationNode::newFunction( 0, 0, $3, 0 ); }
2543	\| '(' abstract_parameter_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2544	{ $$ = $2->addParamList( $6 ); }
2545	\| '(' abstract_parameter_function ')' // redundant parenthesis
2546	{ $$ = $2; }
2547	;
2548
2549	array_parameter_dimension:
2550	// Only the first dimension can be empty or have qualifiers.
2551	array_parameter_1st_dimension
2552	\| array_parameter_1st_dimension multi_array_dimension
2553	{ $$ = $1->addArray( $2 ); }
2554	\| multi_array_dimension
2555	;
2556
2557	// The declaration of an array parameter has additional syntax over arrays in normal variable declarations:
2558	//
2559	// ISO/IEC 9899:1999 Section 6.7.5.2(1) : "The optional type qualifiers and the keyword static shall appear only in
2560	// a declaration of a function parameter with an array type, and then only in the outermost array type derivation."
2561
2562	array_parameter_1st_dimension:
2563	'[' ']'
2564	{ $$ = DeclarationNode::newArray( 0, 0, false ); }
2565	// multi_array_dimension handles the '[' '*' ']' case
2566	\| '[' push type_qualifier_list '*' pop ']' // remaining C99
2567	{ $$ = DeclarationNode::newVarArray( $3 ); }
2568	\| '[' push type_qualifier_list pop ']'
2569	{ $$ = DeclarationNode::newArray( 0, $3, false ); }
2570	// multi_array_dimension handles the '[' assignment_expression ']' case
2571	\| '[' push type_qualifier_list assignment_expression pop ']'
2572	{ $$ = DeclarationNode::newArray( $4, $3, false ); }
2573	\| '[' push STATIC type_qualifier_list_opt assignment_expression pop ']'
2574	{ $$ = DeclarationNode::newArray( $5, $4, true ); }
2575	\| '[' push type_qualifier_list STATIC assignment_expression pop ']'
2576	{ $$ = DeclarationNode::newArray( $5, $3, true ); }
2577	;
2578
2579	// This pattern parses a declaration of an abstract variable, i.e., there is no identifier to which the type applies,
2580	// e.g.:
2581	//
2582	// sizeof( int ); // abstract variable; no identifier name specified
2583	//
2584	// The pattern precludes declaring an array of functions versus a pointer to an array of functions, and returning arrays
2585	// and functions versus pointers to arrays and functions.
2586
2587	variable_abstract_declarator:
2588	variable_abstract_ptr
2589	\| variable_abstract_array attribute_list_opt
2590	{ $$ = $1->addQualifiers( $2 ); }
2591	\| variable_abstract_function attribute_list_opt
2592	{ $$ = $1->addQualifiers( $2 ); }
2593	;
2594
2595	variable_abstract_ptr:
2596	'*'
2597	{ $$ = DeclarationNode::newPointer( 0 ); }
2598	\| '*' type_qualifier_list
2599	{ $$ = DeclarationNode::newPointer( $2 ); }
2600	\| '*' variable_abstract_declarator
2601	{ $$ = $2->addPointer( DeclarationNode::newPointer( 0 ) ); }
2602	\| '*' type_qualifier_list variable_abstract_declarator
2603	{ $$ = $3->addPointer( DeclarationNode::newPointer( $2 ) ); }
2604	\| '(' variable_abstract_ptr ')'
2605	{ $$ = $2; }
2606	;
2607
2608	variable_abstract_array:
2609	array_dimension
2610	\| '(' variable_abstract_ptr ')' array_dimension
2611	{ $$ = $2->addArray( $4 ); }
2612	\| '(' variable_abstract_array ')' multi_array_dimension // redundant parenthesis
2613	{ $$ = $2->addArray( $4 ); }
2614	\| '(' variable_abstract_array ')' // redundant parenthesis
2615	{ $$ = $2; }
2616	;
2617
2618	variable_abstract_function:
2619	'(' variable_abstract_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2620	{ $$ = $2->addParamList( $6 ); }
2621	\| '(' variable_abstract_function ')' // redundant parenthesis
2622	{ $$ = $2; }
2623	;
2624
2625	// This pattern parses a new-style declaration for a parameter variable or function prototype that is either an
2626	// identifier or typedef name and allows the C99 array options, which can only appear in a parameter list.
2627
2628	new_identifier_parameter_declarator_tuple: // CFA
2629	new_identifier_parameter_declarator_no_tuple
2630	\| new_abstract_tuple
2631	\| type_qualifier_list new_abstract_tuple
2632	{ $$ = $2->addQualifiers( $1 ); }
2633	;
2634
2635	new_identifier_parameter_declarator_no_tuple: // CFA
2636	new_identifier_parameter_ptr
2637	\| new_identifier_parameter_array
2638	;
2639
2640	new_identifier_parameter_ptr: // CFA
2641	'*' type_specifier
2642	{ $$ = $2->addNewPointer( DeclarationNode::newPointer( 0 ) ); }
2643	\| type_qualifier_list '*' type_specifier
2644	{ $$ = $3->addNewPointer( DeclarationNode::newPointer( $1 ) ); }
2645	\| '*' new_abstract_function
2646	{ $$ = $2->addNewPointer( DeclarationNode::newPointer( 0 ) ); }
2647	\| type_qualifier_list '*' new_abstract_function
2648	{ $$ = $3->addNewPointer( DeclarationNode::newPointer( $1 ) ); }
2649	\| '*' new_identifier_parameter_declarator_tuple
2650	{ $$ = $2->addNewPointer( DeclarationNode::newPointer( 0 ) ); }
2651	\| type_qualifier_list '*' new_identifier_parameter_declarator_tuple
2652	{ $$ = $3->addNewPointer( DeclarationNode::newPointer( $1 ) ); }
2653	;
2654
2655	new_identifier_parameter_array: // CFA
2656	// Only the first dimension can be empty or have qualifiers. Empty dimension must be factored out due to
2657	// shift/reduce conflict with new-style empty (void) function return type.
2658	'[' ']' type_specifier
2659	{ $$ = $3->addNewArray( DeclarationNode::newArray( 0, 0, false ) ); }
2660	\| new_array_parameter_1st_dimension type_specifier
2661	{ $$ = $2->addNewArray( $1 ); }
2662	\| '[' ']' multi_array_dimension type_specifier
2663	{ $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( 0, 0, false ) ); }
2664	\| new_array_parameter_1st_dimension multi_array_dimension type_specifier
2665	{ $$ = $3->addNewArray( $2 )->addNewArray( $1 ); }
2666	\| multi_array_dimension type_specifier
2667	{ $$ = $2->addNewArray( $1 ); }
2668	\| '[' ']' new_identifier_parameter_ptr
2669	{ $$ = $3->addNewArray( DeclarationNode::newArray( 0, 0, false ) ); }
2670	\| new_array_parameter_1st_dimension new_identifier_parameter_ptr
2671	{ $$ = $2->addNewArray( $1 ); }
2672	\| '[' ']' multi_array_dimension new_identifier_parameter_ptr
2673	{ $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( 0, 0, false ) ); }
2674	\| new_array_parameter_1st_dimension multi_array_dimension new_identifier_parameter_ptr
2675	{ $$ = $3->addNewArray( $2 )->addNewArray( $1 ); }
2676	\| multi_array_dimension new_identifier_parameter_ptr
2677	{ $$ = $2->addNewArray( $1 ); }
2678	;
2679
2680	new_array_parameter_1st_dimension:
2681	'[' push type_qualifier_list '*' pop ']' // remaining C99
2682	{ $$ = DeclarationNode::newVarArray( $3 ); }
2683	\| '[' push type_qualifier_list assignment_expression pop ']'
2684	{ $$ = DeclarationNode::newArray( $4, $3, false ); }
2685	\| '[' push declaration_qualifier_list assignment_expression pop ']'
2686	// declaration_qualifier_list must be used because of shift/reduce conflict with
2687	// assignment_expression, so a semantic check is necessary to preclude them as a type_qualifier cannot
2688	// appear in this context.
2689	{ $$ = DeclarationNode::newArray( $4, $3, true ); }
2690	\| '[' push declaration_qualifier_list type_qualifier_list assignment_expression pop ']'
2691	{ $$ = DeclarationNode::newArray( $5, $4->addQualifiers( $3 ), true ); }
2692	;
2693
2694	// This pattern parses a new-style declaration of an abstract variable or function prototype, i.e., there is no
2695	// identifier to which the type applies, e.g.:
2696	//
2697	// [int] f( int ); // abstract variable parameter; no parameter name specified
2698	// [int] f( [int] (int) ); // abstract function-prototype parameter; no parameter name specified
2699	//
2700	// These rules need LR(3):
2701	//
2702	// new_abstract_tuple identifier_or_type_name
2703	// '[' new_parameter_list ']' identifier_or_type_name '(' new_parameter_type_list_opt ')'
2704	//
2705	// since a function return type can be syntactically identical to a tuple type:
2706	//
2707	// [int, int] t;
2708	// [int, int] f( int );
2709	//
2710	// Therefore, it is necessary to look at the token after identifier_or_type_name to know when to reduce
2711	// new_abstract_tuple. To make this LR(1), several rules have to be flattened (lengthened) to allow the necessary
2712	// lookahead. To accomplish this, new_abstract_declarator has an entry point without tuple, and tuple declarations are
2713	// duplicated when appearing with new_function_specifier.
2714
2715	new_abstract_declarator_tuple: // CFA
2716	new_abstract_tuple
2717	\| type_qualifier_list new_abstract_tuple
2718	{ $$ = $2->addQualifiers( $1 ); }
2719	\| new_abstract_declarator_no_tuple
2720	;
2721
2722	new_abstract_declarator_no_tuple: // CFA
2723	new_abstract_ptr
2724	\| new_abstract_array
2725	;
2726
2727	new_abstract_ptr: // CFA
2728	'*' type_specifier
2729	{ $$ = $2->addNewPointer( DeclarationNode::newPointer( 0 ) ); }
2730	\| type_qualifier_list '*' type_specifier
2731	{ $$ = $3->addNewPointer( DeclarationNode::newPointer( $1 ) ); }
2732	\| '*' new_abstract_function
2733	{ $$ = $2->addNewPointer( DeclarationNode::newPointer( 0 ) ); }
2734	\| type_qualifier_list '*' new_abstract_function
2735	{ $$ = $3->addNewPointer( DeclarationNode::newPointer( $1 ) ); }
2736	\| '*' new_abstract_declarator_tuple
2737	{ $$ = $2->addNewPointer( DeclarationNode::newPointer( 0 ) ); }
2738	\| type_qualifier_list '*' new_abstract_declarator_tuple
2739	{ $$ = $3->addNewPointer( DeclarationNode::newPointer( $1 ) ); }
2740	;
2741
2742	new_abstract_array: // CFA
2743	// Only the first dimension can be empty. Empty dimension must be factored out due to shift/reduce conflict with
2744	// empty (void) function return type.
2745	'[' ']' type_specifier
2746	{ $$ = $3->addNewArray( DeclarationNode::newArray( 0, 0, false ) ); }
2747	\| '[' ']' multi_array_dimension type_specifier
2748	{ $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( 0, 0, false ) ); }
2749	\| multi_array_dimension type_specifier
2750	{ $$ = $2->addNewArray( $1 ); }
2751	\| '[' ']' new_abstract_ptr
2752	{ $$ = $3->addNewArray( DeclarationNode::newArray( 0, 0, false ) ); }
2753	\| '[' ']' multi_array_dimension new_abstract_ptr
2754	{ $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( 0, 0, false ) ); }
2755	\| multi_array_dimension new_abstract_ptr
2756	{ $$ = $2->addNewArray( $1 ); }
2757	;
2758
2759	new_abstract_tuple: // CFA
2760	'[' push new_abstract_parameter_list pop ']'
2761	{ $$ = DeclarationNode::newTuple( $3 ); }
2762	;
2763
2764	new_abstract_function: // CFA
2765	'[' ']' '(' new_parameter_type_list_opt ')'
2766	{ $$ = DeclarationNode::newFunction( 0, DeclarationNode::newTuple( 0 ), $4, 0 ); }
2767	\| new_abstract_tuple '(' push new_parameter_type_list_opt pop ')'
2768	{ $$ = DeclarationNode::newFunction( 0, $1, $4, 0 ); }
2769	\| new_function_return '(' push new_parameter_type_list_opt pop ')'
2770	{ $$ = DeclarationNode::newFunction( 0, $1, $4, 0 ); }
2771	;
2772
2773	// 1) ISO/IEC 9899:1999 Section 6.7.2(2) : "At least one type specifier shall be given in the declaration specifiers in
2774	// each declaration, and in the specifier-qualifier list in each structure declaration and type name."
2775	//
2776	// 2) ISO/IEC 9899:1999 Section 6.11.5(1) : "The placement of a storage-class specifier other than at the beginning of
2777	// the declaration specifiers in a declaration is an obsolescent feature."
2778	//
2779	// 3) ISO/IEC 9899:1999 Section 6.11.6(1) : "The use of function declarators with empty parentheses (not
2780	// prototype-format parameter type declarators) is an obsolescent feature."
2781	//
2782	// 4) ISO/IEC 9899:1999 Section 6.11.7(1) : "The use of function definitions with separate parameter identifier and
2783	// declaration lists (not prototype-format parameter type and identifier declarators) is an obsolescent feature.
2784
2785	//*********************** MISCELLANEOUS ******************************
2786
2787	comma_opt: // redundant comma
2788	// empty
2789	\| ','
2790	;
2791
2792	assignment_opt:
2793	// empty
2794	{ $$ = 0; }
2795	\| '=' assignment_expression
2796	{ $$ = $2; }
2797	;
2798
2799	%%
2800	// ----end of grammar----
2801
2802	void yyerror( const char * ) {
2803	std::cout << "Error ";
2804	if ( yyfilename ) {
2805	std::cout << "in file " << yyfilename << " ";
2806	} // if
2807	std::cout << "at line " << yylineno << " reading token \"" << (yytext[0] == '\0' ? "EOF" : yytext) << "\"" << std::endl;
2808	}
2809
2810	// Local Variables: //
2811	// mode: c++ //
2812	// tab-width: 4 //
2813	// compile-command: "make install" //
2814	// End: //

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